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January 0 or 0 January is an alternative name for December 31. January 0 is the day before January 1 in an annual ephemeris. It keeps the date in the year for which the ephemeris was published, thus avoiding any reference to the previous year, even though it is the same day as December 31 of the previous year.
December 31 is the 365th day of the year (366th in leap years) in the Gregorian calendar. It is known by a collection of names including: Saint Sylvester's Day, [1] New Year's Eve or Old Year's Day/Night, as the following day is New Year's Day. It is the last day of the year; the following day is January 1, the first day of the following year.
The Gregorian calendar year, which is in use as civil calendar in most of the world, begins on January 1 and ends on December 31. [1] It has a length of 365 days in an ordinary year but, in order to reconcile the calendar year with the astronomical cycle, it has 366 days in a leap year. With 97 leap years every 400 years, the Gregorian calendar ...
December: 31 Gregorian years are identified by consecutive year numbers. [7] A calendar date is fully specified by the year (numbered according to a calendar era, ...
December 27, 2023 at 2:20 PM ... Reading the date 12/31/23 reveals a sequential number that reads the same forward and backward. ... every calendar year is linked with a Universal Year number that ...
31: December Total: 355 or 377–378: 445: 365–366: 365–366 History. ... in the Gregorian calendar, year numbers evenly divisible by 100 are not leap years, ...
A common year starting on Sunday is any non-leap year (i.e. a year with 365 days) that begins on Sunday, 1 January, and ends on Sunday, 31 December. Its dominical letter hence is A . The most recent year of such kind was 2023 , and the next one will be 2034 in the Gregorian calendar , [ 1 ] or, likewise, 2018 and 2029 in the obsolete Julian ...
A common year starting on Wednesday is any non-leap year (a year with 365 days) that begins on Wednesday, 1 January, and ends on Wednesday, 31 December. Its dominical letter hence is E . The current year, 2025 , is a common year starting on Wednesday in the Gregorian calendar , and the next such year will be 2031, [ 1 ] or, likewise, 2015 and ...