This day is celebrated in many countries on the 1st of April. People play pranks, hoaxes and practical jokes on co-workers, friends and family to mark the day.
Regular Websites
Puts forward a list of practical jokes, office pranks, safe pranks, fake news headlines and top April Fools' Day hoaxes. - April Fools
http://www.aprilfools.com/
About.com offers a list of pranks and practical jokes, satire, parody and spoofs and urban legends and hoaxes. - April Fools' Day Humor
http://humor.about.com/od/aprilfoolsday/April_Fools_Day_Humor.htm
Kidzworld: April Fools Practical Jokes and Pranks
Offers a list of safe pranks, gags, and jokes for kids. - Kidzworld: April Fools Practical Jokes and Pranks
http://www.kidzworld.com/article/1939-april-fools-practical-jokes-and-pranks
Museum of Hoaxes: Top 10 Worst April Fools' Day Hoaxes
Offers a list of top 10 Worst April Fools' Day hoaxes; these include a fake hanging, fake robbery and the phony deadline among others. - Museum of Hoaxes: Top 10 Worst April Fools' Day Hoaxes
http://www.museumofhoaxes.com/worstaprilfools.html
Proffers commentary about unsubstantiated claims and undetermined origins of April Fools' Day. - Snopes: April Fools Origins
http://www.snopes.com/holidays/aprilfools/origins.asp