When?
- sidereal year
- the time for the earth to make one complete revolution around the sun, relative to the fixed stars
- dead
- a time when coldness (or some other quality associated with death) is intense
- term
- a limited period of time
- time scale
- an arrangement of events used as a measure of duration
- holiday
- a day on which work is suspended by law or custom
- hard times
- a time of difficulty
- ephemera
- something transitory; lasting a day
- Lincoln's Birthday
- the day on which President Abraham Lincoln is remembered
- Shevat
- the fifth month of the civil year: the eleventh month of the ecclesiastical year in the Jewish calendar (in January and February)
- split run
- a print run of a newspaper during which some articles or advertisements are changed to produce a different edition
- phase of the moon
- a time when the Moon presents a particular recurring appearance
- quarter
- a fourth part of a year; three months
- Gregorian calendar month
- a month in the Gregorian calendar
- school day
- any day on which school is in session
- semester
- half a year; a period of 6 months
- 1980s
- the decade from 1980 to 1989
- test period
- a period of time during which someone or something is tested
- vice-presidential term
- the tenure of a vice president
- mid-October
- the middle part of October
- Shrove Tuesday
- the last day before Lent
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