When?
- novitiate
- the period during which you are a novice (especially in a religious order)
- eon
- an immeasurably long period of time
- outing
- a day devoted to an outdoor social gathering
- mid-December
- the middle part of December
- duty period
- the time period during which you are at work
- trimester
- a period of three months; especially one of the three three-month periods into which human pregnancy is divided
- fifties
- the time of life between 50 and 60
- chapter
- any distinct period in history or in a person's life
- lease
- the period of time during which a contract conveying property to a person is in effect
- bimillenary
- the 2000th anniversary (or the celebration of it)
- field day
- a time of unusual pleasure and success
- quarter
- one of four periods into which the school year is divided
- half-century
- a period of 50 years
- spring
- the season of growth
- uptime
- a period of time when something (as a machine or factory) is functioning and available for use
- Boxing Day
- first weekday after Christmas
- Pan American Day
- a day celebrating political and economic unity among American countries
- nap
- a period of time spent sleeping
- Reign of Terror
- the historic period (1793-94) during the French Revolution when thousands were executed
- Pascha
- the Jewish feast of the Passover
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