watchnight , n :
(Christianity, historical) A monthly or quarterly religious service participated in by Methodists which extended past midnight. (Christianity) A religious service involving a review of the year passed and preparation for the year ahead participated in by Methodists and members of other Christian denominations which starts late on New Year's Eve and ends after midnight on New Year's Day; hence, the night that begins on December 31 and ends on January 1. A religious or spiritual vigil. (West African) A night watchman.