Everyone from Google and Twitter to the president joined in for April Fool's Day pranks.
USA Today says 68% of avdertising and marketing executives think April Fool's pranks are unsuitable for the office. Only 3% think pranks are "very appropriate."
But the day has a long history of practical jokes and hoaxes. It's history goes back all the way to the 1300s.
This year, Google made a treasure map overlay for its maps, YouTube announced it would shut down for the day to pick a best video winner and Twitter announced a consonant-only version of the site.