The month of April is the fourth month in the Gregorian Calendar. It is one of four months with 30 days. Historically, it was the second month in the Roman Calendar prior to the addition of the months January and February by King Numa Pompilius around 700 BCE.
A popular saying in the US is "April showers bring May flowers.", which is a reference to the typical, and higly generalized, weather conditions during the month.
4/1/1960 - US launched its first weather satellite.
4/2/1992 - John Gotti (Mafia boss) convicted of Paul Castellano.
4/10/1912 - Titanic sets sail. Four days later she hits an iceberg.
4/30/1803 - Louisiana Territory purchased from France.
4/30/1789 - George Washington took office as first US President.
4/10/1841 - The New York Tribune begins publishing.
Traditionally, April 1st is known as a day to play pranks on friends, coworkers, and relatives. These jokes can range from small lies to elaborate hoaxes. In recent times the day has become very popular in the tech industry with sites like Google and You Tube leading the charge.
2007 - Google announces Gmail will now have the option to print your webmail and have it mailed via traditional post!
2009 - You Tube displayed their "recommended for you" section upside down - including the video.
2010 - Google changes its name to Topeka, in response to the Kansas town that changed its name from Topeka to Google for the month of March as a publicity stunt.