December 31

Also known as 31 December, December 31st, 31st of December, Dec 31

day of the year

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December 31 is the final day of the calendar year in the Gregorian calendar system used internationally. It marks the end of the year and is widely celebrated as New Year's Eve, when people gather to mark the transition to the following year.

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Commons category: 31 December
Commons gallery: December 31
P8168: Lady Writing a Letter with her Maid

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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, 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.

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