April Fools’ Day is generally considered to end at 12:00 noon on April 1 , though some people treat it as a full-day event and prank through the evening. The noon cutoff is the more traditional rule in the U.K. and related customs.

Quick answer

  • Traditional end time: 12 p.m. (noon) on April 1.
  • Looser modern take: some people say it lasts all day.

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