April Fools Day

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A′pril Fools'′ Day`

April 1, when jokes or tricks are traditionally played on the unsuspecting.
References in periodicals archive ?
But Poisson D' Avril is actually a French April Fools Day tradition, which involves kids attempting to attach a paper fish to a victim's back without being noticed.
My boyfriend asked me to move in with him on April Fools Day.
In the spirit of the one-day a year when practical jokes are the norm, B-Man's will trade Teriyaki for Cajun spices, bringing the Southern taste of Louisiana to Pasadena on April Fools day.
It is not April Fools Day until next week but Americans have said who they think is the biggest fool and it's Jacko by a long way.