Wikipedia:Selected anniversaries/August 11
August 11: Independence Day in Chad (1960), Qi Xi in the Chinese calendar (2005)
- 3114 BC - Epoch of the current era in the Maya Long Count Calendar.
- 480 BC - Spartan hoplites under Leonidas I, along with Thespians under Demophilus, fought to the last man in the Battle of Thermopylae, losing to a large Persian invasion force led by Xerxes I.
- 1492 - Cardinal Rodrigo Borgia was elected pope and became known as Pope Alexander VI.
- 1919 - The Weimar Republic adopted its constitution.
- 1970 - A trademark application for the word Spork was published by the U.S. Patent and Trademark Office.