#year a period of time occupying a regular part of a calendar year that is used for some particular activity; "a school year"
supertype: #time_period__period__period_of_time an amount of time; "a time period of 30 years"; "hastened the period of his recovery"
subtype: #school_year the period of time each year when the school is open and people are studying
part: #month a time unit of 30 days; "he was given a month to pay the bill"
part: #new_moon__newmoon__new_phase_of_the_moon the time at which the moon appears as a narrow waxing crescent
part: #half-moon the time at which the moon is at first or last quarter when half its face is illuminated
part: #full_moon__full-of-the-moon__full_phase_of_the_moon the time when the moon is fully illuminated
part: #day__meansolarday__twenty-four_hours__solar_day time for Earth to make a complete rotation on its axis; "two days later they left"; "they put on two performances every day"; "there are 30,000 passengers per day"
part: #daytime__day the time after sunrise and before sunset while it is light outside; "the dawn turned night into day"; "it is easier to make the repairs in the daytime"
part: #morning_time__morningtime__morn__forenoon the time period between dawn and noon; "I spent the morning running errands"
part: #early-morning_hour__earlymorninghour an hour early in the morning
part: #twelve_noon__noon__high_noon__midday__noonday__noontide the middle of the day
part: #nighttime__dark the time after sunset and before sunrise while it is dark outside
part: #evening the early part of night (from dinner until bedtime) spent in a special way; "an evening at the opera"
part: #late-night_hour the latter part of night
part: #midnight 12 o'clock at night; the middle of the night; "young children should not be allowed to stay up until midnight"
part: #small_hours the hours just after midnight
part: #lights-out a prescribed bedtime
part: #hour__hr__60_minutes a period of time equal to 1/24th of a day; "the job will take more than an hour"
part: #half-hour__30_minutes a half of an hour
part: #quarter-hour__quarterhour__15_minutes a quarter of an hour
part: #minute__min a unit of time equal to 60 seconds or 1/60th of an hour; "he ran a 4 minute mile"
part: #second__s____sec 1/60 of a minute; the basic unit of time adopted under the System International d'Unites
part: #millisecond one thousandth of a second
part: #microsecond one millionth of a second; one thousandth of a millisecond
part: #nanosecond one billionth of a second; one thousandth of a microsecond
part: #picosecond one trillionth of a second; one thousandth of a nanosecond
part: #femtosecond one quadrillionth of a second; one thousandth of a nanosecond
part: #attosecond one quintillionth of a second; one thousandth of a femtosecond
part: #quarter.time_unit a unit of time equal to 15 minutes or a quarter of an hour; "it's a quarter til 4"; "a quarter after 4 o'clock"
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