Nouns denoting time and temporal relations

15 August 1945: the date of Allied victory over Japan, World War II
15 minutes: a quarter of an hour
1530s: the decade from 1530 to 1539
1750s: the decade from 1750 to 1759
1760s: the decade from 1760 to 1769
1770s: the decade from 1770 to 1779
1780s: the decade from 1780 to 1789
1790s: the decade from 1790 to 1799
1820s: the decade from 1820 to 1829
1830s: the decade from 1830 to 1839
1840s: the decade from 1840 to 1849
1850s: the decade from 1850 to 1859
1860s: the decade from 1860 to 1869
1870s: the decade from 1870 to 1879
1880s: the decade from 1880 to 1889
1890s: the decade from 1890 to 1899
1900s: the decade from 1900 to 1909
1920s: the decade from 1920 to 1929
1930s: the decade from 1930 to 1939
1940s: the decade from 1940 to 1949
1950s: the decade from 1950 to 1959
1960s: the decade from 1960 to 1969
1970s: the decade from 1970 to 1979
1980s: the decade from 1980 to 1989
1990s: the decade from 1990 to 1999
24-hour interval: time for Earth to make a complete rotation on its axis
24/7: uptime is 24 hours a day 7 days a week
30 minutes: a half of an hour
365 days: a year that is not a leap year
366 days: a calendar year with an extra day added in February
6 June 1944: date of the Allied landing in France, World War II
60 minutes: a period of time equal to 1/24th of a day
8 May 1945: the date of Allied victory in Europe, World War II
absence: the time interval during which something or somebody is away
academic session: the time during which a school holds classes
academic year: the period of time each year when the school is open and people are studying
accelerando: a gradually increasing tempo of music
acceleration: (physics) a rate of increase of velocity
access time: (computer science) the interval between the time data is requested by the system and the time the data is provided by the drive
Adar: the sixth month of the civil year; the twelfth month of the ecclesiastic year in the Jewish calendar (in February and March)
Adar Sheni: included seven times in every 19 years
administration: the tenure of a president
Admission Day: in some states of the United States: a legal holiday commemorating the day the state was admitted to the Union
adolescence: the time period between the beginning of puberty and adulthood
adulthood: the period of time in your life after your physical growth has stopped and you are fully developed
Advent: the season including the four Sundays preceding Christmas
Advent Sunday: the first of the four Sundays during Advent
aeon: an immeasurably long period of time
aeon: the longest division of geological time
afterlife: life after death
afternoon: the part of the day between noon and evening
age of consent: the minimum age for marrying without parental consent or the minimum age for consensual sexual relations; intercourse at an earlier age can result in a charge of assault or statutory rape; the age differs in different states of the Union
Age of Mammals: approximately the last 63 million years
Age of Reptiles: from 230 million to 63 million years ago
age: a time of life (usually defined in years) at which some particular qualification or power arises
age: a late time of life
age: an era of history having some distinctive feature
age: a prolonged period of time
air alert: the time period during which military and civilian agencies are prepared for an enemy air attack
airspeed: the speed of an aircraft relative to the air in which it is flying
Alaska Standard Time: standard time in the 9th time zone west of Greenwich, reckoned at the 135th meridian west; used in Hawaii and most of Alaska
All Saints' Day: a Christian feast day honoring all the saints; first observed in 835
All Souls' Day: a day of supplication for all the souls in purgatory
allegretto: a quicker tempo than andante but not as fast as allegro
allegro: a brisk and lively tempo
allegro con spirito: lively with spirit
Allhallows Eve: the evening before All Saints' Day; often devoted to pranks played by young people
Allhallowtide: the season of All Saints' Day
alpha and omega: the first and last; signifies God's eternity
American Indian Day: US: the 4th Friday in September
anachronism: something located at a time when it could not have existed or occurred
anal phase: (psychoanalysis) the second sexual and social stage of a child's development during which bowel control is learned
andante: a moderately slow tempo (a walking pace)
anniversary: the date on which an event occurred in some previous year (or the celebration of it)
annum: (Latin) year
Annunciation Day: a festival commemorating the announcement of the Incarnation by the angel Gabriel to the Virgin Mary; a quarter day in England, Wales, and Ireland
anomalistic month: period between successive perigees; approximately 27.5546 days
anomalistic year: time of the earth's revolution from perihelion to perihelion again; 365 days and 6 hr and 13 min and 53.1 sec
antiquity: the historic period preceding the Middle Ages in Europe
apogee: a final climactic stage
April: the month following March and preceding May
April Fools' day: the first day of April which is celebrated by playing practical jokes
Arbor Day: a day designated for planting trees
Archaeozoic aeon: the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
Armed Forces Day: the 3rd Saturday in May
Armistice Day: a legal holiday in the United States; formerly Armistice Day but called Veterans' Day since 1954
arrival time: the time at which a public conveyance is scheduled to arrive at a given destination
Asadha: the fourth month of the Hindu calendar
Ascension of the Lord: (Christianity) celebration of the Ascension of Christ into heaven; observed on the 40th day after Easter
Ash Wednesday: the 7th Wednesday before Easter; the first day of Lent; the day following Mardi Gras (`Fat Tuesday'); a day of fasting and repentance
Assumption of Mary: celebration in the Roman Catholic Church of the Virgin Mary's being taken up into heaven when her earthly life ended; corresponds to the Dormition in the Eastern Orthodox Church
astronomical year: the time for the earth to make one revolution around the sun, measured between two vernal equinoxes
Asvina: the seventh month of the Hindu calendar
Atlantic Standard Time: standard time in the 4th time zone west of Greenwich, reckoned at the 60th meridian; used in Puerto Rico and the Virgin Islands and Bermuda and the Canadian Maritime Provinces
attendance: the frequency with which a person is present
attosecond: one quintillionth (10^-18) of a second; one thousandth of a femtosecond
attrition rate: the rate of shrinkage in size or number
August: the month following July and preceding September
auld langsyne: past times remembered with nostalgia
aurora: the first light of day
autumn: the season when the leaves fall from the trees
Av: the eleventh month of the civil year; the fifth month of the ecclesiastical year in the Jewish calendar (in July and August)
babyhood: the early stage of growth or development
bachelorhood: the time of a man's life prior to marriage
bank holiday: any of several weekdays when banks are closed; a legal holiday in Britain
Baroque period: the historic period from about 1600 until 1750 when the baroque style of art, architecture, and music flourished in Europe
baseball season: the season when baseball is played
basketball season: the season when basketball is played
Bastille Day: a legal holiday in France celebrating the storming of the Paris bastille in 1789
beauty sleep: sleep before midnight
bedtime: the time you go to bed
beginning: the time at which something is supposed to begin
bell: (nautical) each of the eight half-hour units of nautical time signaled by strokes of a ship's bell; eight bells signals 4:00, 8:00, or 12:00 o'clock, either a.m. or p.m.
Bering Standard Time: standard time in the 11th time zone west of Greenwich, reckoned at the 165th meridian west; used in the Midway Islands
Bhadrapada: the sixth month of the Hindu calendar
bicentenary: the 200th anniversary (or the celebration of it)
bimester: a period of 2 months
bimillenary: a span of 2000 years
bimillenary: the 2000th anniversary (or the celebration of it)
biological clock: an innate mechanism in living organisms that controls the periodicity of many physiological functions
biological time: the time of various biological processes
birth: the time when something begins (especially life)
birth rate: the ratio of live births in an area to the population of that area; expressed per 1000 population per year
birthday: an anniversary of the day on which a person was born (or the celebration of it)
birthday: the date on which a person was born
bit: an indefinitely short time
bits per second: (computer science) the rate at which data is transferred (as by a modem)
blackout: a suspension of radio or tv broadcasting
bloom: the best time of youth
bloom: the period of greatest prosperity or productivity
blue moon: a long time
bottom: the second half of an inning; while the home team is at bat
bout: a period of illness
bout: (sports) a division during which one team is on the offensive
Boxing Day: first weekday after Christmas
boyhood: the childhood of a boy
break: a time interval during which there is a temporary cessation of something
breakfast time: the customary or habitual hour for eating breakfast
breath: a short respite
bronze age: (classical mythology) the third age of the world, marked by war and violence
Bronze Age: (archeology) a period between the Stone and Iron Ages, characterized by the manufacture and use of bronze tools and weapons
Brumaire: second month of the Revolutionary calendar (October and November); the month of mist
by-and-by: an indefinite time in the future
bygone: past events to be put aside
c: the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second
caesura: a pause or interruption (as in a conversation)
Caitra: the first Hindu calendar month (corresponding to March in the Gregorian calendar)
calendar: a system of timekeeping that defines the beginning and length and divisions of the year
calendar day: a day reckoned from midnight to midnight
calendar month: one of the twelve divisions of the calendar year
calendar week: a period of seven consecutive days starting on Sunday
calendar year: the year (reckoned from January 1 to December 31) according to Gregorian calendar
Caliphate: the era of Islam's ascendancy from the death of Mohammed until the 13th century; some Moslems still maintain that the Moslem world must always have a calif as head of the community
Cambrian period: from 544 million to about 500 million years ago; marine invertebrates
Candlemas Day: feast day commemorating the presentation of Christ in the temple; a quarter day in Scotland
canicular days: the hot period between early July and early September; a period of inactivity
canonical hour: (Roman Catholic Church) one of seven specified times for prayer
Carboniferous period: from 345 million to 280 million years ago
cardiac output: the amount of blood pumped out by the ventricles in a given period of time
cease: (`cease' is a noun only in the phrase `without cease') end
centenary: the 100th anniversary (or the celebration of it)
Central Standard Time: standard time in the 6th time zone west of Greenwich, reckoned at the 90th meridian; used in the central United States
centripetal acceleration: the acceleration toward the center that holds a satellite in elliptical orbit
century: a period of 100 years
change of life: the time in a woman's life in which the menstrual cycle ends
channel capacity: the maximum data rate that can be attained over a given channel
chapter: any distinct period in history or in a person's life
checkout: the latest time for vacating a hotel room
childhood: the time of person's life when they are a child
Chislev: the third month of the civil year; the ninth month of the ecclesiastical year in the Jewish calendar (in November and December)
Christian era: the time period beginning with the supposed year of Christ's birth
Christian holy day: a religious holiday for Christians
Christian year: the year in the ecclesiastical calendar; especially feast days and special seasons
Christmas Day: a Christian holiday celebrating the birth of Christ; a quarter day in England, Wales, and Ireland
Christmas Eve: the day before Christmas
Christmastide: period extending from Dec. 24 to Jan. 6
chukka: (polo) one of six divisions into which a polo match is divided
church calendar: a calendar of the Christian year indicating the dates of fasts and festivals
church festival: a festival having religious significance
Cinco de Mayo: the fifth of May which is observed in Mexico and Mexican-American communities in the United States to commemorate the Mexican victory over the French in the Battle of Puebla in 1862
circadian rhythm: a daily cycle of activity observed in many living organisms
Citizenship Day: celebrated in the United States
civil time: the official time in a local region (adjusted for location around the Earth); established by law or custom
climacteric: a period in a man's life corresponding to menopause
clock time: a reading of a point in time as given by a clock
clocking: the time taken to traverse a measured course
close: the temporal end; the concluding time
closing time: the regular time of day when an establishment closes to the public
clotting time: the time it takes for a sample of blood to clot; used to diagnose some clotting disorders
cold snap: a spell of cold weather
command overhead: (computer science) the processing time required by a device prior to the execution of a command
commencement day: the day on which university degrees are conferred
common measure: a time signature indicating four beats to the bar
Commonwealth Day: British, anniversary of Queen Victoria's birth
compassionate leave: (military) leave granted in an emergency such as family sickness or death
compensatory time: time off that is granted to a worker as compensation for working overtime
complin: last of the seven canonical hours just before retiring
contemporary world: the circumstances and ideas of the present age
continuance: the property of enduring or continuing in time
continuance: the period of time during which something continues
continuum: a continuous nonspatial whole or extent or succession in which no part or portion is distinct or distinguishable from adjacent parts
Corpus Christi: Thursday after Trinity Sunday; first celebrated in 1246
cosmic time: the time covered by the physical formation and development of the universe
count per minute: frequency per minute
cradle: birth of a person
crepuscle: the time of day immediately following sunset
Cretaceous period: from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants
crime rate: the ratio of crimes in an area to the population of that area; expressed per 1000 population per year
curfew: the time that the curfew signal is sounded
cycle: an interval during which a recurring sequence of events occurs
dark: the time after sunset and before sunrise while it is dark outside
data rate: the rate at which circuits or other devices operate when handling digital information
date: the present
date: a particular day specified as the time something happens
date: the particular day, month, or year (usually according to the Gregorian calendar) that an event occurred
date of reference: (astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded
date: the specified day of the month
dawn: an opening time period
day: an era of existence or influence
day: a day assigned to a particular purpose or observance
day: some point or period in time
day: the recurring hours when you are not sleeping (especially those when you are working)
day: the period of time taken by a particular planet (e.g. Mars) to make a complete rotation on its axis
Day of Atonement: (Judaism) a solemn and major fast day on the Jewish calendar; 10th of Tishri; its observance is one of the requirements of the Mosaic law
Day of Judgement: (New Testament) day at the end of time following Armageddon when God will decree the fates of all individual humans according to the good and evil of their earthly lives
day of rest: a day set aside for rest
day of the week: any one of the seven days in a week
day off: a day when you are not required to work
day shift: the work shift during the day (as 8 a.m. to 4 p.m.)
day: the time after sunrise and before sunset while it is light outside
day: the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day
daylight saving: time during which clocks are set one hour ahead of local standard time; widely adopted during summer to provide extra daylight in the evenings
days: the time during which someone's life continues
dead: a time when coldness (or some other quality associated with death) is intense
dead air: an inadvertent interruption in a broadcast during which there is no sound
deadline: the point in time at which something must be completed
death rate: the ratio of deaths in an area to the population of that area; expressed per 1000 per year
death: the time when something ends
death: the time at which life ends; continuing until dead
deathbed: the last few hours before death
decade: a period of 10 years
deceleration: (physics) a rate of decrease in velocity
December: the last (12th) month of the year
Decoration Day: legal holiday in the United States, last Monday in May; commemorates the members of the United States armed forces who were killed in war
deep: the central and most intense or profound part
delay: time during which some action is awaited
departure time: the time at which a public conveyance is scheduled to depart from a given point of origin
Devonian period: from 405 million to 345 million years ago; preponderance of fishes and appearance of amphibians and ammonites
Dhu al-Hijjah: the twelfth month of the Islamic calendar and the season of the hajj; has one extra day in leap years
Dhu'l-Qa'dah: the eleventh month of the Islamic calendar
diamond jubilee: an anniversary celebrating the passage of 60 years
diamond wedding: the 60th wedding anniversary
dinnertime: the customary or habitual hour for the evening meal
Discovery Day: a legal holiday commemorating the discovery of America by Christopher Columbus
distance: a remote point in time
distance: the interval between two times
dogwatch: either of two short watches: from 4-6 pm or 6-8 pm
Dominion Day: a legal holiday in Canada commemorating receiving Dominion status in 1867
dose rate: the quantity of radiation absorbed per unit time
dotage: mental infirmity as a consequence of old age; sometimes shown by foolish infatuations
double time: a fast marching pace (180 steps/min) or slow jog
downtime: a period of time when something (as a machine or factory) is not operating (especially as a result of malfunctions)
drinking age: the age at which is legal for a person to buy alcoholic beverages
drought: a prolonged shortage
dry season: one of the two seasons in tropical climates
due date: the date on which an obligation must be repaid
duple time: musical time with two beats in each bar
duty period: the time period during which you are at work
duty tour: a period of time spent in military service
early days: an early period of development
early-morning hour: an hour early in the morning
Earth-received time: the coordinated universal time when an event is received on Earth
Easter: a Christian celebration of the Resurrection of Christ; celebrated on the Sunday following the first full moon after the vernal equinox
Easter Sunday: the day (in March or April) on which the festival of Easter is celebrated
Eastern Standard Time: standard time in the 5th time zone west of Greenwich, reckoned at the 75th meridian; used in the eastern United States
Eastertide: the Easter season
eighties: the time of life between 80 and 90
elapsed time: the time that elapses while some event is occurring
election day: the day appointed for an election; in the United States it is the 1st Tuesday after the 1st Monday in November
eleventh hour: the latest possible moment
Elizabethan age: a period in British history during the reign of Elizabeth I in the 16th century; an age marked by literary achievement and domestic prosperity
Ellul: the twelfth month of the civil year; the sixth month of the ecclesiastical year in the Jewish calendar (in August and September)
Ember Day: a day set aside for fasting and prayer
embolism: an insertion into a calendar
end: the point in time at which something ends
entr'acte: the interlude between two acts of a play
Eocene epoch: from 58 million to 40 million years ago; presence of modern mammals
Eolithic Age: the earliest part of the Stone Age marked by the earliest signs of human culture
ephemera: something transitory; lasting a day
Epipaleolithic: middle part of the Stone Age beginning about 15,000 years ago
Epiphany of Our Lord: twelve days after Christmas; celebrates the visit of the three wise men to the infant Jesus
episcopate: the term of office of a bishop
epoch: a unit of geological time that is a subdivision of a period and is itself divided into ages
epoch: a period marked by distinctive character or reckoned from a fixed point or event
equinox: either of two times of the year when the sun crosses the plane of the earth's equator and day and night are of equal length
era: a major division of geological time; an era is usually divided into two or more periods
escape velocity: the minimum velocity needed to escape a gravitational field
ESR: the rate at which red blood cells settle out in a tube of blood under standardized conditions; a high rate usually indicates the presence of inflammation
eternity: a seemingly endless time interval (waiting)
eternity: time without end
eve: the period immediately before something
eve: the day before
eve: the latter part of the day (the period of decreasing daylight from late afternoon until nightfall)
evening: the early part of night (from dinner until bedtime) spent in a special way
evening: a later concluding time period
evening shift: the work shift during the evening (as 4 p.m. to midnight)
evensong: the sixth of the seven canonical hours of the divine office; early evening; now often made a public service on Sundays
exhibition season: the time before the regular games begin when football or baseball teams play practice games
expiration: a coming to an end of a contract period
extended time scale: (simulation) the time scale used in data processing when the time-scale factor is greater than one
extension: a mutually agreed delay in the date set for the completion of a job or payment of a debt
extra innings: overtime play until one team is ahead at the end of an inning; e.g. baseball
extra time: playing time beyond regulation, to break a tie
face time: work time spent at the location of or in the presence of other people
fag end: the time of the last part of something
fast day: a day designated for fasting
Fast of Esther: (Judaism) a minor fast day on Adar 13 commemorates three days that Esther fasted before approaching the Persian king on behalf of the Jewish people; the fast is connected with Purim
Fast of Gedaliah: (Judaism) a minor fast day on Tishri 3 that commemorates the killing of the Jewish governor of Judah
Fast of Tammuz: (Judaism) a minor fast day on Tammuz 17 when the walls of Jerusalem were breached
Fast of Tevet: (Judaism) a minor fast day on Tevet 10 commemorates the beginning of the siege of Jerusalem and has also been proclaimed a memorial day for the six million Jews who died in the Holocaust
Fast of the Firstborn: (Judaism) a minor fast day on Nissan 14 that is observed only by firstborn males; it is observed on the day before Passover
fast time scale: (simulation) the time scale used in data processing when the time-scale factor is less than one
Father's Day: US: third Sunday in June
feast day: a day designated for feasting
Feast of Dormition: celebration in the Eastern Orthodox Church of the Virgin Mary's being taken up into heaven when her earthly life ended; corresponds to the Assumption in the Roman Catholic Church and is also celebrated on August 15th
Feast of Sacrifice: the 10th day of Dhu'l-Hijja; all Muslims attend a service in the mosques and those who are not pilgrims perform a ritual slaughter of a sheep (commemorating God's ransom of Abraham's son from sacrifice) and give at least a third of the meat to charity
Feast of Tabernacles: a major Jewish festival beginning on the eve of the 15th of Tishri and commemorating the shelter of the Israelites during their 40 years in the wilderness
Feast of the Circumcision: (Roman Catholic Church and Anglican Church) feast day celebrating the circumcision of Jesus; celebrated on January 1st
Feast of the Dedication: (Judaism) an eight-day Jewish holiday commemorating the rededication of the Temple of Jerusalem in 165 BC
Feast of the Unleavened Bread: (Judaism) a Jewish festival (traditionally 8 days from Nissan 15) celebrating the exodus of the Israelites from Egypt
Feast of Weeks: (Judaism) Jewish holy day celebrated on the sixth of Sivan to celebrate Moses receiving the Ten Commandments
February: the month following January and preceding March
February 29: the name of the day that is added during a leap year
femoral pulse: pulse of the femoral artery (felt in the groin)
femtosecond: one quadrillionth (10^-15) of a second; one thousandth of a picosecond
feria: a weekday on which no festival or holiday is celebrated
fertile period: the time in the menstrual cycle when fertilization is most likely to be possible (7 days before to 7 days after ovulation)
festival: a day or period of time set aside for feasting and celebration
field day: a time of unusual pleasure and success
field day: a day for outdoor athletic competition
field day: (military) a day for military exercises and display
field day: a day devoted to an outdoor social gathering
fifties: the time of life between 50 and 60
fin de siecle: the end of a century, especially the 19th century
final period: the final division into which the play of a game is divided
financial year: any accounting period of 12 months
first half: the first of two halves of play
First of May: observed in many countries to celebrate the coming of spring; observed in Russia and related countries in honor of labor
first period: the first division into which the play of a game is divided
first quarter: the first fourth of the Moon's period of revolution around the Earth
first trimester: time period extending from the first day of the last menstrual period through 12 weeks of gestation
fishing season: the season during which it is legal to catch fish
Flag Day: commemorating the adoption of the United States flag in 1777
float: the time interval between the deposit of a check in a bank and its payment
Floreal: eighth month of the Revolutionary calendar (April and May); the month of flowers
flow: the amount of fluid that flows in a given time
flux: the rate of flow of energy or particles across a given surface
football season: the season when football is played
forenoon: the time period between dawn and noon
forties: the time of life between 40 and 50
fortnight: a period of fourteen consecutive days
fourth dimension: the fourth coordinate that is required (along with three spatial dimensions) to specify a physical event
frame: (baseball) one of nine divisions of play during which each team has a turn at bat
free time: time available for hobbies and other activities that you enjoy
frequence: the number of occurrences within a given time period
Friday: the sixth day of the week; the fifth working day
Frimaire: third month of the Revolutionary calendar (November and December); the frosty month
Fructidor: twelfth month of the Revolutionary calendar (August and September); the month of fruit
full term: the end of gestation or point at which birth is imminent
full: the time when the Moon is fully illuminated
furlough: a temporary leave of absence from military duty
future date: a particular day in the future that is specified as the time something will happen
future: the time yet to come
gait: the rate of moving (especially walking or running)
game: (tennis) a division of play during which one player serves
generation: the normal time between successive generations
generation: a stage of technological development or innovation
genital phase: (psychoanalysis) the fifth sexual and social stage in a person's development occurring during adolescence; interest focuses on sexual activity
geologic time: the time of the physical formation and development of the earth (especially prior to human history)
geological period: a unit of geological time during which a system of rocks formed
Germinal: seventh month of the Revolutionary calendar (March and April); the month of buds
gestation: the period during which an embryo develops (about 266 days in humans)
GHz: 1,000,000,000 periods per second
girlhood: the childhood of a girl
glacial epoch: any period of time during which glaciers covered a large part of the earth's surface
go: a time period for working (after which you will be relieved by someone else)
golden age: a time period when some activity or skill was at its peak
golden age: any period (sometimes imaginary) of great peace and prosperity and happiness
Golden Age: (classical mythology) the first and best age of the world, a time of ideal happiness, prosperity, and innocence; by extension, any flourishing and outstanding period
golden wedding anniversary: the 50th wedding anniversary
golden years: the time of life after retirement from active work
Good Friday: Friday before Easter
grace: a period of time past the deadline for fulfilling an obligation during which a penalty that would be imposed for being late is waived, especially an extended period granted as a special favor
grave: death of a person
graveyard shift: the work shift during the night (as midnight to 8 a.m.)
graveyard watch: a watch during the night (as from midnight to 8 a.m.)
Great Depression: a period during the 1930s when there was a worldwide economic depression and mass unemployment
Great Schism: the period from 1378 to 1417 during which there were two papacies in the Roman Catholic Church, one in Rome and one in Avignon
Greenwich Mean Time: the local time at the 0 meridian passing through Greenwich, England; it is the same everywhere
Gregorian calendar month: a month in the Gregorian calendar
Groundhog Day: if the ground hog emerges and sees his shadow on this day, there will be 6 more weeks of winter
groundspeed: the speed of an aircraft relative to the ground
growing season: the season during which a crop grows best
growth rate: the rate of increase in size per unit time
guest night: an evening when members of a club or college can bring their friends as guests
Guy Fawkes Day: day for the celebration of the discovery of the Gunpowder Plot
Guy Fawkes Night: effigies of Guy Fawkes are burned on this night
half: one of two divisions into which some games or performances are divided: the two divisions are separated by an interval
half life: the time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate)
half-century: a period of 50 years
half-holiday: a day on which half is free from work or duty
half-moon: the time at which the Moon is at first or last quarter when half its face is illuminated
half-term: a short vacation about halfway through a school term
halftime: an intermission between the first and second half of a game
happy hour: the time of day when a bar sells alcoholic drinks at a reduced price
hard time: a term served in a maximum security prison
hard times: a time of difficulty
Harlem Renaissance: a period in the 1920s when African-American achievements in art and music and literature flourished
harvest moon: the full moon nearest the September equinox
Hawaii Standard Time: standard time in the 10th time zone west of Greenwich, reckoned at the 150th meridian west; used in Hawaii and the western Aleutian Islands
heart rate: the rate at which the heart beats; usually measured to obtain a quick evaluation of a person's health
hebdomad: any period of seven consecutive days
here and now: at this time
Heshvan: the second month of the civil year; the eighth month of the ecclesiastical year in the Jewish calendar (in October and November)
High Holy Day: Jewish holy days observed with particular solemnity
high noon: the middle of the day
high season: the season when travel is most active and rates are highest
high time: the latest possible moment
Hindu calendar: the lunisolar calendar governing the religious life of Hindus; an extra month is inserted after every month in which there are two new moons (once every three years)
Hindu calendar month: any lunisolar month in the Hindu calendar
history: the aggregate of past events
history: the continuum of events occurring in succession leading from the past to the present and even into the future
hockey season: the season when hockey is played
Hogmanay: New Year's Eve in Scotland
holiday: a day on which work is suspended by law or custom
holiday season: a time when many people take holidays
holiday: leisure time away from work devoted to rest or pleasure
Holocene epoch: approximately the last 10,000 years
holy day of obligation: a day when Catholics must attend Mass and refrain from servile work, and Episcopalians must take Communion
holy day: a day specified for religious observance
Holy Innocents' Day: December 28, commemorating Herod's slaughter of the children of Bethlehem
Holy Saturday: the Saturday before Easter; the last day of Lent
Holy Year: (Roman Catholic Church) a period of remission from sin (usually granted every 25 years)
honeymoon: a holiday taken by a newly married couple
honeymoon: the early (usually calm and harmonious) period of a relationship; business or political
hospitalization: a period of time when you are confined to a hospital
hot spell: a spell of hot weather
hour: a special and memorable period
hour: clock time
hours: an indefinite period of time
hours: a period of time assigned for work
hunting season: the season during which it is legal to kill a particular species
hypervelocity: excessive velocity
Hz: the unit of frequency; one hertz has a periodic interval of one second (named for Heinrich Rudolph Hertz)
Id al-Fitr: a Muslim day of feasting at the end of Ramadan
ides: in the Roman calendar: the 15th of March or May or July or October or the 13th of any other month
Immaculate Conception: Roman Catholic holy day first celebrated in 1854
immortality: perpetual life after death
in time: in the correct rhythm
Inauguration Day: the day designated for inauguration of the United States President
incarnation: time passed in a particular bodily form
incipience: beginning to exist or to be apparent
incubation: (pathology) the phase in the development of an infection between the time a pathogen enters the body and the time the first symptoms appear
incubation period: the period between infection and the appearance of symptoms of the disease
incumbency: the term during which some position is held
Independence Day: a legal holiday in the United States
indiction: a 15-year cycle used as a chronological unit in ancient Rome and adopted in some medieval kingdoms
Industrial Revolution: the transformation from an agricultural to an industrial nation
infant deathrate: the death rate during the first year of life
inflation rate: the rate of change of prices (as indicated by a price index) calculated on a monthly or annual basis
information age: a period beginning in the last quarter of the 20th century when information became easily accessible through publications and through the manipulation of information by computers and computer networks
instant: a particular point in time
interim: the time between one event, process, or period and another
interlude: an intervening period or episode
interregnum: the time between two reigns, governments, etc.
interval: a definite length of time marked off by two instants
iron age: (classical mythology) the last and worst age of the world
Iron Age: (archeology) the period following the Bronze Age; characterized by rapid spread of iron tools and weapons
Islamic calendar month: any lunar month in the Muslim calendar
isometry: the growth rates in different parts of a growing organism are the same
Italian Renaissance: the early period when Italy was the center of the Renaissance
Iyyar: the eighth month of the civil year; the second month of the ecclesiastical year (in April and May)
January: the first month of the year; begins 10 days after the winter solstice
Jazz Age: the 1920s in the United States characterized in the novels of F. Scott Fitzgerald as a period of wealth, youthful exuberance, and carefree hedonism
Jefferson Davis' Birthday: celebrated in southern United States
jerk: (mechanics) the rate of change of acceleration
Jewish calendar: (Judaism) the calendar used by the Jews; dates from 3761 BC (the assumed date of the Creation of the world); a lunar year of 354 days is adjusted to the solar year by periodic leap years
Jewish calendar month: a month in the Jewish calendar
Jewish holy day: a religious holiday for Jews
Jewish New Year: (Judaism) a solemn Jewish feast day celebrated on the 1st or 1st and 2nd of Tishri; noted for the blowing of the shofar
jubilee: a special anniversary (or the celebration of it)
July: the month following June and preceding August
Jumada I: the fifth month of the Islamic calendar
Jumada II: the sixth month of the Islamic calendar
June: the month following May and preceding July
June 21: June 21, when the sun is at its northernmost point
Jurassic period: from 190 million to 135 million years ago; dinosaurs; conifers
Jyaistha: the third month of the Hindu calendar
Karttika: the eighth month of the Hindu calendar
kHz: one thousand periods per second
kilometers per hour: the ratio of the distance traveled (in kilometers) to the time spent traveling (in hours)
kingdom come: the end of time
kingdom come: the next world
kip: sleep
knot: (of ships and wind) a unit of speed equal to one nautical mile per hour or about 1.15 statute miles per hour
Labor Day: first Monday in September in the United States and Canada
lactation: the period following birth during which milk is secreted
Lag b'Omer: (Judaism) Jewish holy day; the 33rd day after the 2nd day of Passover; the 18th day of Iyar
Lammas Day: commemorates Saint Peter's miraculous deliverance from prison; a quarter day in Scotland; a harvest festival in England
Lammastide: the season of Lammas
lapse: a break or intermission in the occurrence of something
last gasp: the point of death or exhaustion or completion
last half: the second of two halves of play
last quarter: the last fourth of the Moon's period of revolution around the Earth
late-night hour: the latter part of night
latency period: (psychoanalysis) the fourth period (from about age 5 or 6 until puberty) during which sexual interests are supposed to be sublimated into other activities
latency: the time that elapses between a stimulus and the response to it
latency: (computer science) the time it takes for a specific block of data on a data track to rotate around to the read/write head
latent period: the time that elapses before the presence of a disease is manifested by symptoms
lead time: the time interval between the initiation and the completion of a production process
leap second: a second (as measured by an atomic clock) added to or subtracted from Greenwich Mean Time in order to compensate for slowing in the Earth's rotation
lease: the period of time during which a contract conveying property to a person is in effect
leave: the period of time during which you are absent from work or duty
legal age: the age at which persons are considered competent to manage their own affairs
legal holiday: authorized by law and limiting work or official business
leisure: time available for ease and relaxation
Lententide: a period of 40 weekdays from Ash Wednesday to Holy Saturday
letup: a pause during which things are calm or activities are diminished
liberty: leave granted to a sailor or naval officer
life: the period between birth and the present time
life: the period from the present until death
life expectancy: an expected time to live as calculated on the basis of statistical probabilities
life: a prison term lasting as long as the prisoner lives
life: the period during which something is functional (as between birth and death)
lights-out: a prescribed bedtime
limit: final or latest limiting point
limitation: (law) a time period after which suits cannot be brought
Lincoln's Birthday: the day on which President Abraham Lincoln is remembered
long haul: a period of time sufficient for factors to work themselves out
longueur: a period of dullness or boredom (especially in a work of literature or performing art)
Lord's Day: first day of the week; observed as a day of rest and worship by most Christians
Low Sunday: the Sunday following Easter
Lower Carboniferous period: from 345 million to 310 million years ago; increase of land areas; primitive ammonites; winged insects
Lower Paleolithic: the oldest part of the Paleolithic Age with the emergence of the hand ax; ended about 120,000 years ago
luminous flux: the rate of flow of light energy
lunar calendar: a calendar based on lunar cycles
lunar day: the period of time taken for the moon to make one full rotation on its axis (about 27.3 sidereal days)
lunar month: the period between successive new moons (29.531 days)
lunar time period: there are usually two high and two low tides each day
lunar year: a period of 12 lunar months
lunch period: the customary or habitual hour for eating lunch
lunisolar calendar: a calendar based on both lunar and solar cycles
lunitidal interval: interval between the moon's transit of a particular meridian and the next high tide at that meridian
lustrum: a period of five years
luteal phase: the second half of the menstrual cycle after ovulation; the corpus luteum secretes progesterone which prepares the endometrium for the implantation of an embryo; if fertilization does not occur then menstrual flow begins
M.M.: the pace of music measured by the number of beats occurring in 60 seconds
Magha: the eleventh month of the Hindu calendar; corresponds to January in the Gregorian calendar
maiden: (cricket) an over in which no runs are scored
major fast day: one of two major fast days on the Jewish calendar
man hour: a time unit used in industry for measuring work
manana: an indefinite time in the future
March: the month following February and preceding April
March equinox: March 21
Margasivsa: the ninth month of the Hindu calendar
market day: a fixed day for holding a public market
Martin Luther King Jr's Birthday: observed on the Monday closest to January 15
matins: the first canonical hour; at daybreak
Maundy Thursday: the Thursday before Easter; commemorates the Last Supper
May: the month following April and preceding June
meal: any of the occasions for eating food that occur by custom or habit at more or less fixed times
mealtime: the hour at which a meal is habitually or customarily eaten
mean solar time: (astronomy) time based on the motion of the mean sun (an imaginary sun moving uniformly along the celestial equator)
meno mosso: played at reduced speed; less rapid
menstrual cycle: a recurring cycle (beginning at menarche and ending at menopause) in which the endometrial lining of the uterus prepares for pregnancy; if pregnancy does not occur the lining is shed at menstruation
menstrual phase: the phase of the menstrual cycle during which the lining of the uterus is shed (the first day of menstrual flow is considered day 1 of the menstrual cycle)
Mesasamkranti: Hindu solar holiday at the beginning of the new astrological year when the sun enters the constellation Aries
Messidor: tenth month of the Revolutionary calendar (June and July); the month of harvest
metabolic rate: rate of metabolism; the amount of energy expended in a give period
MHz: one million periods per second
Michaelmas Day: honoring the archangel Michael; a quarter day in England, Wales, and Ireland
Michaelmastide: the season of Michaelmas
microsecond: one millionth (10^-6) of a second; one thousandth of a millisecond
mid-April: the middle part of April
mid-August: the middle part of August
mid-December: the middle part of December
mid-February: the middle part of February
mid-January: the middle part of January
mid-July: the middle part of July
mid-June: the middle part of June
mid-March: the middle part of March
mid-May: the middle part of May
mid-nineties: the time of life between 90 and 100
mid-November: the middle part of November
mid-October: the middle part of October
mid-September: the middle part of September
mid-seventies: the time of life between 70 and 80
mid-sixties: the time of life between 60 and 70
mid-thirties: the time of life between 30 and 40
mid-twenties: the time of life between 20 and 30
midafternoon: the middle part of the afternoon
middle: time between the beginning and the end of a temporal period
middle age: the time of life between youth and old age (e.g., between 40 and 60 years of age)
Middle Ages: the period of history between classical antiquity and the Italian Renaissance
Middle Paleolithic: the time period of Neanderthal man; ended about 35,000 years BC
midnight: 12 o'clock at night; the middle of the night
Midsummer Night: the night before Midsummer Day
Midsummer's Day: a quarter day in England, Wales, and Ireland
midterm: the middle of the gestation period
midterm: middle of an academic term or a political term in office
midweek: the middle of a week
midwinter: the middle of winter
miles per hour: the ratio of the distance traveled (in miles) to the time spent traveling (in hours)
miles per hour: a speedometer reading for the momentary rate of travel
millenary: the 1000th anniversary (or the celebration of it)
millenary: a span of 1000 years
millennium: (New Testament) in Revelations it is foretold that those faithful to Jesus will reign with Jesus over the earth for a thousand years; the meaning of these words have been much debated; some denominations (e.g. Jehovah's Witnesses) expect it to be a thousand years of justice and peace and happiness
millisecond: one thousandth (10^-3) of a second
min: a unit of time equal to 60 seconds or 1/60th of an hour
minor fast day: one of five minor fast days on the Jewish calendar
minority: any age prior to the legal age
Miocene epoch: from 25 million to 13 million years ago; appearance of grazing mammals
modern era: the present or recent times
Mohammedan calendar: the lunar calendar used by Muslims; dates from 622 AD (the year of the Hegira); the beginning of the Muslim year retrogresses through the solar year completing the cycle every 32 years
moment of truth: a crucial moment on which much depends
moment of truth: the moment in a bullfight when the matador kills the bull
Monday: the second day of the week; the first working day
monsoon: rainy season in southern Asia when the southwestern monsoon blows, bringing heavy rains
month: a time unit of approximately 30 days
month of Sundays: a time perceived as long
moratorium: a legally authorized postponement before some obligation must be discharged
morrow: the next day
Mother's Day: second Sunday in May
Mountain Standard Time: standard time in the 7th time zone west of Greenwich, reckoned at the 105th meridian west; used in the mountain states of the United States
movable feast: a religious holiday that falls on different dates in different years
Muharram: the first month of the Islamic calendar
multistage: occurring in more than one stage
musical time: (music) the beat of musical rhythm
musth: an annual phase of heightened sexual excitement in the males of certain large mammals (especially elephants); is associated with discharge from a gland between the eye and ear
muzzle velocity: the velocity of a projectile as it leaves the muzzle of a gun
name day: the feast day of a saint whose name one bears
nanosecond: one billionth (10^-9) of a second; one thousandth of a microsecond
nap: a period of time spent sleeping
Neolithic Age: latest part of the Stone Age beginning about 10,000 BC in the Middle East (but later elsewhere)
neonatal mortality: the death rate during the first 28 days of life
neonatal period: the first 28 days of life
neutron flux: the rate of flow of neutrons; the number of neutrons passing through a unit area in unit time
New Deal: the historic period (1933-1940) in the United States during which President Franklin Roosevelt's economic policies were implemented
new moon: the time at which the Moon appears as a narrow waxing crescent
New Style calendar: the solar calendar now in general use, introduced by Gregory XIII in 1582 to correct an error in the Julian calendar by suppressing 10 days, making Oct 5 be called Oct 15, and providing that only centenary years divisible by 400 should be leap years; it was adopted by Great Britain and the American colonies in 1752
New Year: the calendar year just begun
New Year's Day: the first day of the year
New Year's Eve: the last day of the year
New York minute: a very short time (as the time it takes the eye to blink or the heart to beat)
night: the time between sunset and midnight
night: the period spent sleeping
night: a period of ignorance or backwardness or gloom
night: a shortening of nightfall
night: the dark part of the diurnal cycle considered a time unit
Ninth of Ab: (Judaism) a major fast day on the Jewish calendar commemorating the destruction of the temples in Jerusalem
Nissan: the seventh month of the civil year; the first month of the ecclesiastic year (in March and April)
Nivose: fourth month of the Revolutionary calendar (December and January); the snowy month
nonce: the present occasion
none: a canonical hour that is the ninth hour of the day counting from sunrise
nones: the fifth of the seven canonical hours; about 3 p.m.
note value: (music) the relative duration of a musical note
November: the month following October and preceding December
November 5: anniversary of the discovery of the Gunpowder Plot
noviciate: the period during which you are a novice (especially in a religious order)
now: the momentary present
nowadays: the period of time that is happening now; any continuous stretch of time including the moment of speech
Nowrooz: (Persian) the new year holiday in Iran and Azerbaijan and Afghanistan and Pakistan and parts of India and among the Kurds; comes at the vernal equinox
Nyquist frequency: (telecommunication) twice the maximum frequency occurring in the transmitted signal
Nyquist rate: (telecommunication) the lowest sampling rate that will permit accurate reconstruction of a sampled analog signal
occasion: the time of a particular event
occupation: the period of time during which a place or position or nation is occupied
octave: a feast day and the seven days following it
October: the month following September and preceding November
off year: a year in which no major political elections are held
off year: a year in which productivity is low or inferior
off-day: a day when things go poorly
off-season: the season when travel is least active and rates are lowest
offing: the near or foreseeable future
old: past times (especially in the phrase `in days of old')
Old Style calendar: the solar calendar introduced in Rome in 46 b.c. by Julius Caesar and slightly modified by Augustus, establishing the 12-month year of 365 days with each 4th year having 366 days and the months having 31 or 30 days except for February
Oligocene epoch: from 40 million to 25 million years ago; appearance of sabertoothed cats
Olympiad: one of the four-year intervals between Olympic Games; used to reckon time in ancient Greece for twelve centuries beginning in 776 BC
oral phase: (psychoanalysis) the first sexual and social stage of an infant's development; the mouth is the focus of the libido and satisfaction comes from suckling and chewing and biting
orbit period: the time it takes to complete one full orbit around a celestial body
Ordovician period: from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds
over: (cricket) the division of play during which six balls are bowled at the batsman by one player from the other team from the same end of the pitch
overtime: work done in addition to regular working hours
overtime period: a period of overtime play to resolve a tie; e.g. basketball
OWLT: the elapsed time it takes for light (or radio signals) to travel between the Earth and a celestial object
pace: the rate of some repeating event
Pacific Standard Time: standard time in the 8th time zone west of Greenwich, reckoned at the 120th meridian west; used in far western states of the United States
pacing: (music) the speed at which a composition is to be played
paid vacation: a vacation from work by an employee with pay granted
Paleocene epoch: from 63 million to 58 million years ago; appearance of birds and earliest mammals
Paleolithic Age: second part of the Stone Age beginning about 750,000 to 500,000 years BC and lasting until the end of the last ice age about 8,500 years BC
Paleozoic era: from 544 million to about 230 million years ago
Palm Sunday: Sunday before Easter
Pan American Day: a day celebrating political and economic unity among American countries
Pansa: the tenth month of the Hindu calendar
Pascha: the Christian festival of Easter
Pascha: the Jewish feast of the Passover
pass: (military) a written leave of absence
Passion Sunday: second Sunday before Easter
Passion Week: the week before Easter
past: a earlier period in someone's life (especially one that they have reason to keep secret)
past: the time that has elapsed
patch: a period of indeterminate length (usually short) marked by some action or condition
Patriot's Day: the 3rd Monday in April; Massachusetts and Maine celebrate the battle of Lexington and Concord in 1775
payday: the day on which you receive pay for your work
peacetime: a period of time during which there is no war
peculiar velocity: velocity with respect to the local standard of rest
period: the interval taken to complete one cycle of a regularly repeating phenomenon
period: (ice hockey) one of three divisions into which play is divided in hockey games
period: the end or completion of something
period of play: (in games or plays or other performances) the time during which play proceeds
period: an amount of time
Permian period: from 280 million to 230 million years ago; reptiles
Phalguna: the twelfth month of the Hindu calendar
phallic phase: (psychoanalysis) the third stage in a child's development when awareness of and manipulation of the genitals is supposed to be a primary source of pleasure
Phanerozoic aeon: the period from about 540 million years ago until the present, a period when abundant life existed
phase of the moon: a time when the Moon presents a particular recurring appearance
phase: a particular point in the time of a cycle; measured from some arbitrary zero and expressed as an angle
phase: any distinct time period in a sequence of events
picosecond: one trillionth (10^-12) of a second; one thousandth of a nanosecond
pinpoint: a very brief moment
Platonic year: time required for one complete cycle of the precession of the equinoxes, about 25,800 years
playday: time for play or diversion
Pleistocene epoch: from two million to 11 thousand years ago; extensive glaciation of the northern hemisphere; the time of human evolution
Pliocene epoch: from 13 million to 2 million years ago; growth of mountains; cooling of climate; more and larger mammals
Pluviose: fifth month of the Revolutionary calendar (January and February); the rainy month
point: an instant of time
Prairial: ninth month of the Revolutionary calendar (May and June); the month of meadows
Precambrian period: the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago
prehistoric culture: the time during the development of human culture before the appearance of the written word
prepuberty: a period of two years immediately prior to the onset of puberty when growth and changes leading to sexual maturity occur
preseason: a period prior to the beginning of the regular season which is devoted to training and preparation
Presidents' Day: the third Monday in February; commemorates both presidents Lincoln and Washington
press run: the period that presses run to produce an issue of a newspaper
prime: the second canonical hour; about 6 a.m.
prime time: the hours between 7 and 11 p.m. when the largest tv audience is available
prime: the time of maturity when power and vigor are greatest
Priscoan aeon: the earliest eon in the history of the Earth from the first accretion of planetary material (around 4,600 million years ago) until the date of the oldest known rocks (about 3,800 million years ago); no evidence of life
prison term: the period of time a prisoner is imprisoned
probation: a trial period during which an offender has time to redeem himself or herself
probation: a trial period during which your character and abilities are tested to see whether you are suitable for work or for membership
processing time: the time it takes to complete a prescribed procedure
prohibition: the period from 1920 to 1933 when the sale of alcoholic beverages was prohibited in the United States by a constitutional amendment
Proterozoic aeon: from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms
psychological moment: the most appropriate time for achieving a desired effect
puberty: the time of life when sex glands become functional
puerperium: time period following childbirth when the mother's uterus shrinks and the other functional and anatomic changes of pregnancy are resolved
Purim: (Judaism) a Jewish holy day commemorating their deliverance from massacre by Haman
quadrennium: a period of four years
Quadrigesima Sunday: the first Sunday in Lent
quarter: a fourth part of a year; three months
quarter: (football, professional basketball) one of four divisions into which some games are divided
quarter: one of four periods into which the school year is divided
quarter: a unit of time equal to 15 minutes or a quarter of an hour
quarter day: a Christian holy day; one of four specified days when certain payments are due
quarter-century: a period of 25 years
quatercentenary: the 400th anniversary (or the celebration of it)
Quaternary period: last 2 million years
quattrocento: the 15th century in Italian art and literature
question time: a period during a parliamentary session when members of British Parliament may ask questions of the ministers
quick time: a normal marching pace of 120 steps per minute
quincentenary: the 500th anniversary (or the celebration of it)
Quinquagesima Sunday: the Sunday before Ash Wednesday (the beginning of Lent)
quinquennium: a period of five years
Rabi I: the third month of the Islamic calendar
Rabi II: the fourth month of the Islamic calendar
radial pulse: pulse of the radial artery (felt in the wrist)
radial velocity: velocity along the line of sight toward or away from the observer
radiant flux: the rate of flow of radiant energy (electromagnetic waves)
rag day: a day on which university students hold a rag
rag: a week at British universities during which side-shows and processions of floats are organized to raise money for charities
rain date: an alternative date set for some outdoor event in case it rains on the appointed date
rainy day: a (future) time of financial need
rainy season: one of the two seasons in tropical climates
Rajab: the seventh month of the Islamic calendar
Ramadan: the ninth month of the Islamic calendar; the month of fasting; the holiest period for the Islamic faith
Ramanavami: Hindu lunar holiday (on the 9th day of Caitra) to celebrate the birth of Rama
rate: a magnitude or frequency relative to a time unit
rate of respiration: the rate at which a person inhales and exhales; usually measured to obtain a quick evaluation of a person's health
rate of return: the amount returned per unit of time expressed as a percentage of the cost
real time: (computer science) the time it takes for a process under computer control to occur
real time: the actual time that it takes a process to occur
Reconstruction Period: the period after the American Civil War when the southern states were reorganized and reintegrated into the Union; 1865-1877
red-letter day: a memorably happy or noteworthy day (from the custom of marking holy days in red on church calendars)
refractory period: (neurology) the time after a neuron fires or a muscle fiber contracts during which a stimulus will not evoke a response
regency: the period of time during which a regent governs
Regency: the period from 1811-1820 when the Prince of Wales was regent during George III's periods of insanity
regulation time: (sports) the normal prescribed duration of a game
reign: the period during which a monarch is sovereign
reign: a period during which something or somebody is dominant or powerful
Reign of Terror: the historic period (1793-94) during the French Revolution when thousands were executed
reign of terror: any period of brutal suppression thought to resemble the Reign of Terror in France
Rejoicing over the Law: (Judaism) a Jewish holy day celebrated on the 22nd or 23rd of Tishri to celebrate the completion of the annual cycle of readings of the Torah
relaxation time: the time constant of an exponential return of a system to equilibrium after a disturbance
relief: a pause for relaxation
Remembrance Sunday: the Sunday nearest to November 11 when those who died in World War I and World War II are commemorated
Renaissance: the period of European history at the close of the Middle Ages and the rise of the modern world; a cultural rebirth from the 14th through the middle of the 17th centuries
residence time: the period of time spent in a particular place
Restoration: the reign of Charles II in England; 1660-1685
retardation: the extent to which something is delayed or held back
rev: rate of revolution of a motor
Revolutionary calendar: the calendar adopted by the first French Republic in 1793 and abandoned in 1805; dates were calculated from Sept. 22, 1792
Revolutionary calendar month: a month in the Revolutionary calendar
Robert E Lee's Birthday: celebrated in southern United States
Rogation Day: one of the three days before Ascension Day; observed by some Christians as days of supplication
ROI: (corporate finance) the amount, expressed as a percentage, that is earned on a company's total capital calculated by dividing the total capital into earnings before interest, taxes, or dividends are paid
Roman calendar: the lunar calendar in use in ancient Rome; replaced by the Julian calendar in 46 BC
Roman times: the time period during which Rome dominated Europe
Rosh Chodesh: (Judaism) the beginning of each month in the Jewish calendar; marked by a special liturgy
RTLT: the elapsed time it takes for a signal to travel from Earth to a spacecraft (or other body) and back to the starting point
rubato: a flexible tempo; not strictly on the beat
rule: the duration of a monarch's or government's power
run: the continuous period of time during which something (a machine or a factory) operates or continues in operation
run-time: (computer science) the length of time it takes to execute a software program
run-time: the time at which a (software or multimedia) program is run
running time: the length of time that a movie or tv show runs
rush hour: the times at the beginning and end of the working day when many people are traveling to or from work
s: 1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites
Sabbath: a day of rest and worship: Sunday for most Christians; Saturday for the Jews and a few Christians; Friday for Muslims
sabbatical year: a sabbatical leave lasting one year
sabbatical: a leave usually taken every seventh year
Sabbatum: the seventh and last day of the week; observed as the Sabbath by Jews and some Christians
safe period: that time during a woman's menstrual cycle during which conception is least likely to occur (usually immediately before of after menstruation)
Saint Agnes's Eve: a Christian holy day
Saint Joseph: a Christian holy day
Saint Martin's summer: a period of unusually warm weather in the autumn
Saint Patrick's Day: a day observed by the Irish to commemorate the patron saint of Ireland
Saint Valentine's Day: a day for the exchange of tokens of affection
saint's day: a day commemorating a saint
Saints Peter and Paul: first celebrated in the 3rd century
sampling frequency: (telecommunication) the frequency of sampling a continuously varying signal
sampling rate: (telecommunication) the frequency of sampling per unit time
Saphar: the second month of the Islamic calendar
SCET: the coordinated universal time on board the spacecraft
school day: any day on which school is in session
school: the period of instruction in a school; the time period when school is in session
schooldays: the time of life when you are going to school
SCLK: the clock time given by a clock carried on board a spacecraft
season: a recurrent time marked by major holidays
season: a period of the year marked by special events or activities in some field
season: one of the natural periods into which the year is divided by the equinoxes and solstices or atmospheric conditions
second period: the second division into which the play of a game is divided
second trimester: time period extending from the 13th to the 27th week of gestation
seedtime: the time during which seeds should be planted
seedtime: any time of new development
seek time: (computer science) the time it takes for a read/write head to move to a specific data track
sell-by date: a date stamped on perishable produce indicating the date by which it should be sold
semester: half a year; a period of 6 months
semester: one of two divisions of an academic year
semicentenary: the 50th anniversary (or the celebration of it)
September: the month following August and preceding October
September 11: the day in 2001 when Arab suicide bombers hijacked United States airliners and used them as bombs
September equinox: September 22
Septuagesima Sunday: the 3rd Sunday before Lent (or the 9th before Easter)
sesquicentennial: the 150th anniversary (or the celebration of it)
set: a unit of play in tennis or squash
sext: the fourth of the seven canonical hours; about noon
Shaaban: the eighth month of the Islamic calendar
Shawwal: the tenth month of the Islamic calendar
sheepshearing: the time or season when sheep are sheared
shelf life: the length of time a packaged food or drug will last without deteriorating
Shevat: the fifth month of the civil year: the eleventh month of the ecclesiastical year in the Jewish calendar (in January and February)
shibah: (Judaism) a period of seven days of mourning after the death of close relative
show time: the point in time at which an entertainment (a movie or television show etc.) is scheduled to begin
Shrove Tuesday: the last day before Lent
Shrovetide: immediately preceding Lent
sick leave: a leave of absence from work because of illness
sidereal hour: 1/24 of a sidereal day
sidereal month: period between successive conjunctions with a star, 27.322 days
sidereal time: measured by the diurnal motion of stars
sidereal year: the time for the earth to make one complete revolution around the sun, relative to the fixed stars
silly season: a time usually late summer characterized by exaggerated news stories about frivolous matters for want of real news
Silurian period: from 425 million to 405 million years ago; first air-breathing animals
silver age: (classical mythology) the second age of the world, characterized by opulence and irreligion; by extension, a period secondary in achievement to a golden age
silver jubilee: an anniversary celebrating the passage of 25 years
silver wedding anniversary: the 25th wedding anniversary
Siwan: the ninth month of the civil year; the third month of the ecclesiastical year in the Jewish calendar (in May and June)
slot: a time assigned on a schedule or agenda
small hours: the hours just after midnight
snap: a spell of cold weather
social season: the season for major social events
solar calendar: a calendar based on solar cycles
solar constant: the rate at which radiant solar energy is received at the outer layer of the earth's atmosphere
solar month: one-twelfth of a solar or tropical year
Solemnity of Mary: (Roman Catholic Church) a holy day of obligation
solstice: either of the two times of the year when the sun is at its greatest distance from the celestial equator
space age: the age beginning with the first space travel; from 1957 to the present
spacing: the time between occurrences of a repeating event
span: the complete duration of something
speech day: an annual day in the schools when speeches are made and prizes are distributed
speed: distance travelled per unit time
split run: a print run of a newspaper during which some articles or advertisements are changed to produce a different edition
split shift: a working shift divided into two periods of time with several hours in between
spring training: preseason training during the spring
spring: the season of growth
Sravana: the fifth month of the Hindu calendar
St Martin's Day: the feast of Saint Martin; a quarter day in Scotland
starting point: earliest limiting point
steerageway: (nautical) the minimum rate of motion needed for a vessel to be maneuvered
stint: an unbroken period of time during which you do something
Stone Age: (archeology) the earliest known period of human culture, characterized by the use of stone implements
study hall: a period of time during the school day that is set aside for study
sudden death: (sports) overtime in which play is stopped as soon as one contestant scores; e.g. football and golf
summer: the period of finest development, happiness, or beauty
summer school: an academic session during the summer; usually for remedial or supplementary study
summer: the warmest season of the year; in the northern hemisphere it extends from the summer solstice to the autumnal equinox
sundown: the time in the evening at which the sun begins to fall below the horizon
TDT: (astronomy) a measure of time defined by Earth's orbital motion; terrestrial time is mean solar time corrected for the irregularities of the Earth's motions
teens: the time of life between the ages of 12 and 20
terce: the third canonical hour; about 9 a.m.
tercentenary: the 300th anniversary (or the celebration of it)
term: a limited period of time
terminal leave: final leave before discharge from military service
terminal velocity: the constant maximum velocity reached by a body falling through the atmosphere under the attraction of gravity
Tertiary period: from 63 million to 2 million years ago
test period: a period of time during which someone or something is tested
Tet: the New Year in Vietnam; observed for three days after the first full moon after January 20th
Tevet: the fourth month of the civil year; the tenth month of the ecclesiastical year (in December and January)
Texas Independence Day: Texans celebrate the anniversary of Texas' declaration of independence from Mexico in 1836
Thammuz: the tenth month of the civil year; the fourth month of the ecclesiastic year (in June and July)
Thanksgiving Day: fourth Thursday in November in the United States; second Monday in October in Canada; commemorates a feast held in 1621 by the Pilgrims and the Wampanoag
theatrical season: the season when new plays are produced
then: that time; that moment
Thermidor: eleventh month of the Revolutionary calendar (July and August); the month of heat
third trimester: time period extending from the 28th week of gestation until delivery
threshold: the starting point for a new state or experience
Thursday: the fifth day of the week; the fourth working day
THz: one trillion periods per second
tiebreaker: overtime play in order to break a tie; e.g. tennis and soccer
time: a suitable moment
time: a period of time considered as a resource under your control and sufficient to accomplish something
time: an indefinite period (usually marked by specific attributes or activities)
time constant: (electronics) the time required for the current or voltage in a circuit to rise or fall exponentially through approximately 63 per cent of its amplitude
time frame: a time period during which something occurs or is expected to occur
time immemorial: the distant past beyond memory
time limit: a time period within which something must be done or completed
time of life: a period of time during which a person is normally in a particular life state
time off: a time period when you are not required to work
time scale: an arrangement of events used as a measure of duration
time unit: a unit for measuring time periods
time-out: a brief suspension of play
timekeeping: the act or process of determining the time
times: a more or less definite period of time now or previously present
Tishri: the first month of the civil year; the seventh month of the ecclesiastical year in the Jewish calendar (in September and October)
today: the day that includes the present moment (as opposed to yesterday or tomorrow)
today: the present time or age
tomorrow: the near future
tomorrow: the day after today
tonight: the present or immediately coming night
top: the first half of an inning; while the visiting team is at bat
track-to-track seek time: (computer science) the time it takes for a read/write head to move to an adjacent data track
Transfiguration Day: (Christianity) a church festival held in commemoration of the Transfiguration of Jesus
travel time: a period of time spent traveling
Triassic period: from 230 million to 190 million years ago; dinosaurs, marine reptiles; volcanic activity
trick: a period of work or duty
trimester: a period of three months; especially one of the three three-month periods into which human pregnancy is divided
trimester: one of three divisions of an academic year
Trinity Sunday: eighth Sunday after Easter
triple time: musical time with three beats in each bar
triple-crown season: a season of baseball during which a player wins the triple crown
TRM: the coordinated universal time when a transmission is sent from Earth to a spacecraft or other celestial body
Tuesday: the third day of the week; the second working day
turn of the century: the period from about ten years before to ten years after a new century
turnaround: time need to prepare a vessel or ship for a return trip
Twelfth night: eve of Twelfth day; evening of January 5
Twelfthtide: the season of Epiphany
twelvemonth: a period of time containing 365 (or 366) days
twentieth century: the century from 1901 to 2000
United Nations Day: a day for celebrating the founding of the United Nations
Upper Carboniferous period: from 310 million to 280 million years ago; warm climate; swampy land
Upper Paleolithic: the time period during which only modern Homo sapiens was known to have existed; ended about 10,000 years BC
uptime: a period of time when something (as a machine or factory) is functioning and available for use
usance: the period of time permitted by commercial usage for the payment of a bill of exchange (especially a foreign bill of exchange)
UTC: Greenwich Mean Time updated with leap seconds
vac: informal term for vacation
Vaisakha: the second month of the Hindu calendar
Vendemiaire: first month of the Revolutionary calendar (September and October); the month of the grape harvest
Ventose: sixth month of the Revolutionary calendar (February and March); the windy month
vice-presidency: the tenure of a vice president
Victoria Day: a public holiday in Canada on the Monday on or before May 24th
Victorian age: a period in British history during the reign of Queen Victoria in the 19th century; her character and moral standards restored the prestige of the British monarchy but gave the era a prudish reputation
Victory Day: the day of a victory
voting age: the age at which a person is old enough to vote in public elections
Walpurgis Night: eve of May Day
wartime: a period of time during which there is armed conflict
washday: a day set aside for doing household laundry
Washington's Birthday: the day on which George Washington is remembered
watch: a period of time (4 or 2 hours) during which some of a ship's crew are on duty
watch: the period during which someone (especially a guard) is on duty
wedding anniversary: the anniversary of the day on which you were married (or the celebration of it)
wedding day: the day of a wedding
wedding night: the night after the wedding when bride and groom sleep together
Wednesday: the fourth day of the week; the third working day
wee: a short time
week from Monday: a time period of a week or more
week: hours or days of work in a calendar week
weekday: any day except Sunday (and sometimes except Saturday)
weekend: a time period usually extending from Friday night through Sunday; more loosely defined as any period of successive days including one and only one Sunday
weeknight: any night of the week except Saturday or Sunday
Whitsun Monday: the day after Whitsunday; a legal holiday in England and Wales and Ireland
Whitsun Tuesday: the day after Whitmonday
Whitsunday: seventh Sunday after Easter; commemorates the emanation of the Holy Spirit to the Apostles; a quarter day in Scotland
Whitsuntide: Christian holiday; the week beginning on Whitsunday (especially the first 3 days)
widowhood: the time of a woman's life when she is a widow
window: the time period that is considered best for starting or finishing something
winter solstice: December 22, when the sun is at its southernmost point
winter: the coldest season of the year; in the northern hemisphere it extends from the winter solstice to the vernal equinox
words per minute: the rate at which words are produced (as in speaking or typing)
work day: a day on which work is done
work time: a time period when you are required to work
workday: the amount of time that a worker must work for an agreed daily wage
Y2K: the year 2000 in the Gregorian calendar
year: the period of time that it takes for a planet (as, e.g., Earth or Mars) to make a complete revolution around the sun
year: a period of time occupying a regular part of a calendar year that is used for some particular activity
year dot: as long ago as anyone can remember
year of grace: any year of the Christian era
year-end: the end of a calendar year
yesterday: the day immediately before today
yesterday: the recent past
yore: time long past
youth: the time of life between childhood and maturity
zero hour: the time set for the start of an action or operation