There are many traditions associated with April Fool’s Day, including relics from ancient rites of the vernal equinox, a farcical commemoration of Jesus’s trial, and the changing to the Julian from the Gregorian calendar, which moved New Year’s from April 1 to January 1. Those who refused to make the change were fools.
Modern April Fool’s Day is documented in England in the early 1700s. April Fool’s Day in the United States probably peaked in the 80s and 90s which Sun Microsystems staged elaborate hoaxes which were covered by the media. The Gaea Times.
This year, however, Verge reports that Microsoft Leads the Way in Banning April Fool’s Day pranks.