Tomorrow is April Fools Day. It's one of the most light-hearted days of the year. Origins of April Fools Day are obscure. The most commonly cited theory holds that it dates from 1582, the year France adopted the Gregorian Calendar, which shifted the observance of New Year's Day from the end of March (around the time of the vernal equinox) to the first of January. You might search for some original April Fools Day prank in the past. Here are some of the April Fools Day pranks.

Look alikes of Vladimir Lenin L, Boris Yeltsin C and Adolf Hitler gather on Arbat street in Mosc..
Look alikes of Vladimir Lenin (L), Boris Yeltsin (C) and Adolf Hitler gather on Arbat street in Moscow April 1 during festivities marking April Fools Day. REUTERS
Samuel Brako from Ghana, a student of Krasnoyarsk University dressed as a road policeman, checks a drivers licence on a road in Russias Siberian city of Krasnoyarsk
Samuel Brako, 33, from Ghana, a student of Krasnoyarsk University dressed as a road policeman, checks a driver's licence on a road in Russia's Siberian city of Krasnoyarsk, April 1, 2010. The joke was organised by students of the local university and road police to mark April Fool's Day. Local media had announced the day before that the first trainee from Africa will start work as a road policeman in Krasnoyarsk. REUTERS
A Chinese man holds two quotbloody plastic handsquot at a toyshop that sells products for the coming April..
A Chinese man holds two "bloody plastic hands" at a toyshop that sells products for the coming April Fools' Day in Fuyang, east China's Anhui province, March 31, 2005. April Fools' Day. China Daily China Daily Inform
Mini unveils an April Fools joke before unveiling their new Mini Countryman car at the New York International Auto Show in New York
Mini unveils an April Fools joke before unveiling their new Mini Countryman car at the New York International Auto Show in New York April 1, 2010. REUTERS
APRIL FOOLS RUNNERS START BACKWARDS MILE RACE IN NEW YORKS CENTRAL PARK.
Runners start the 13th Annual April Fools Day New York City "Backwards Mile" in Central Park in Manhattan, April 1. The April Fools Day traditional run which saw more than 100 runners complete the one mile backwards running race was won by 28 year old Arthur Magni from Newton Mass in a time of 7:02. MS/MMR Reuters
Members of First Church of Last Laugh march in 30th Annual St. Stupids Day Parade down streets of financial district
Members of the First Church of the Last Laugh march in the 30th Annual St. Stupid's Day Parade down the streets of the financial district in San Francisco, California, April 1, 2008. The parade occurs every year on April Fools' Day and pokes fun at the political and financial events in the United States. REUTERS
Members of the marching band make their way to the financial district during the First Church of the Last Laughs 31st annual St. Stupids Day Parade on April Fools Day in San Francisco
Members of the marching band make their way to the financial district during the First Church of the Last Laugh's 31st annual St. Stupid's Day Parade on April Fool's Day in San Francisco, California April 1, 2009. The parade mocked the current financial crisis and other current global topics. REUTERS
April fool's day