When?

hour
a special and memorable period
 
March
the month following February and preceding April
 
semicentenary
the 50th anniversary (or the celebration of it)
 
Av
the eleventh month of the civil year; the fifth month of the ecclesiastical year in the Jewish calendar (in July and August)
 
childhood
the time of person's life when they are a child
 
First of May
observed in many countries to celebrate the coming of spring; observed in Russia and related countries in honor of labor
 
incumbency
the term during which some position is held
 
mid-August
the middle part of August
 
quinquennium
a period of five years
 
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
 
sudden death
(sports) overtime in which play is stopped as soon as one contestant scores; e.g. football and golf
 
mid-March
the middle part of March
 
October
the month following September and preceding November
 
travel time
a period of time spent traveling
 
Whitsuntide
Christian holiday; the week beginning on Whitsunday (especially the first 3 days)
 
lunar year
a period of 12 lunar months
 
nineties
the decade from 1990 to 1999
 
kip
sleep
 
Bronze Age
(archeology) a period between the Stone and Iron Ages, characterized by the manufacture and use of bronze tools and weapons
 
hospitalization
a period of time when you are confined to a hospital
 
  List More