December 31

This is an accepted version of this page

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.