Calendar year

From Wikipedia, the free encyclopedia

According to the Gregorian calendar, the calendar year begins on January 1 and ends on December 31. Other alignments of the 12-month period can be used for purposes of accounting (see fiscal year).

Generally speaking, a calendar year begins on the New Year's day of the given calendar system and ends on the day before the following New Year's day.

By convention, a calendar year consists of a natural number of days. To reconcile the calendar year with an astronomical cycle (which could not possibly be reckoned in a whole number of days), certain years contain extra days. Through further insertion of non-day units of time, the calendar year can be further synchronized; however, these extra units of time are not considered part of the calendar.

[edit] See also

• Calendar
• Calendar reform
• Fiscal year
• ISO 8601
• ISO week date
• Leap year
• Seasonal year
• Yearca:Any civil

et:Kalendriaasta fr:Année calendaire nl:Kalenderjaar fi:Kalenterivuosi sv:Kalenderår th:ปีปฏิทิน