tropical year
tropical year, time between successive vernal equinoxes; 365 days, 5 hr, 48 min, 46 sec of mean solar time (see solar time). The tropical year is the basis of the year used in the Gregorian calendar.
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Greenwich Mean Time , Greenwich mean time solar time , solar time,time defined by the position of the sun. The solar day is the time it takes for the sun to return to the same meridian in the sky. Local s… universal time , universal time System of time reckoning based on the mean solar day, the average interval between two successive transits of the Sun across the Green… time zone , time zone One of 24 divisions of the Earth's surface, each 15° of longitude wide, within which the time of day is reckoned to be the same. At a confe… New Year , The Mishnah (rh 1:1) enumerates four separate days of the year, each of which is regarded as a New Year (Heb. *Rosh Ha-Shanah, lit. "head of the year… Bruckner Cycle , Brückner cycle Tendency for the cyclical recurrence of runs of wet years at about 35-year intervals, with warmer and drier years in between, reported…
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tropical year