July 10: International Bathroom Stall Graffiti Day
- 1796 – Carl Friedrich Gauss discovers that every positive integer is representable as a sum of at most three triangular numbers, yet he remains steadfastly confounded by other number-shapes such as the octagonal numbers and the irritating square pi.
- 1821 – The United States takes possession of its newly bought territory of Florida from Spain. The state instantly becomes recognized for its oranges, old people, hurricanes, and other stereotypes, except for Disney World which was not constructed until 1875.
- 1938 – Diabolical billionaire Howard Hughes sets a new record by completing a 91 hour flight around the world in just 87 hours.
- 2005 – Microsoft decides to remove the "Undo" button from all its programs, "for customer convenience".
- 2006 – Realizing their mistake in the previous year, Microsoft tries to fix the problem, yet is unable to Undo the mistake due to the lack of a button enabling this process.
- 2007 – On the anniversary of its acquisition by the United States, Florida is flooded while ironically leaving Sea World above water (pictured).