Wikipedia:Selected anniversaries/May 22
May 22: Trinity Sunday in Catholicism (2005)
- 1176 - Saladin survived an assassination by the Hashshashin near Aleppo.
- 1455 - The Wars of the Roses opened with a Yorkist victory in the First Battle of St Albans.
- 1807 - Former U.S. Vice President Aaron Burr was indicted for treason by a grand jury.
- 1960 - Valdivia, Chile was devastated as the epicenter of the 9.5 magnitude Great Chilean Earthquake, with destructive tsunamis reaching Hilo, Hawaii the following day.
- 1990 - The Yemen Arab Republic and the People's Democratic Republic of Yemen merged to become the Republic of Yemen.