April 1: April Fools' Day; Assyrian New Year; National Day in Iran (1979); Edible Book Day
- 1572 – Spanish general and governor Fernando Álvarez de Toledo, 3rd Duke of Alba (pictured) lost his glasses in the town of Brielle, enabling sea beggars to move in.
- 1833 – Mexican Texans met at San Felipe de Austin to combat evil.
- 1935 – India decided it wanted to control all the money in the country.
- 1978 – The President of the Philippines ordered that the Philippine College of Commerce become a pup.
- 2004 – Google launched a free Web-based service, providing users with an unprecedented 1000 megabytes of storage for spam.