AAsta

Aasta is the Estonian word for year, a basic unit of time based on the cycle of the Earth's orbit around the Sun, and it is used to designate both the calendar year and a period of twelve months. In everyday language, it can refer to the calendar year (for example, this year, last year, next year) or to a duration consisting of several years (three years, five years, etc.). The length of a year in the Gregorian calendar is 365 days in common years and 366 days in leap years; leap years follow the standard rule: years divisible by 4 are leap years, except that century years are leap years only if divisible by 400.

In Estonian grammar, aasta is a common noun that declines for case and number. The plural nominative form is aastad, and the genitive plural is aastate. It also appears in age expressions, for example "kolm aastat vana" meaning three years old. The term is used in various time expressions and in compound words such as aastaarv (year number) or aastaraamat (an almanac).

The concept aligns with the calendar system used in Estonia and elsewhere, and the word is widely used in media, literature, and daily speech to refer to time periods and annual cycles.