Wikipedia:Selected anniversaries/July 1
- 1867 - Canada Day: The Province of Canada, New Brunswick, and Nova Scotia united in Confederation.
- 1904 - The first Olympic Games in North America opened in St. Louis, Missouri.
- 1916 - The First day on the Somme, the bloodiest day in the history of the British Army.
- 1991 - The Warsaw Pact was officially dissolved.
- 1997 - The British colony of Hong Kong was returned to the People's Republic of China, to be governed under the policy of "One Country, Two Systems".