all fools' day
愚人節
All Fools' Day The first day of April, a day on which sportive impositions are practiced.
The first of April, some do say,
Is set apart for All Fools' Day. --Poor Robin's Almanack (1760).
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All Fools' day
n : April 1; celebrated by playing of practical jokes [syn: April
Fools', April Fools' day]