This is a list of selected July 1 anniversaries that appear in the "On this day" section of the Main Page. To suggest a new item, in most cases, you can be bold and edit this page. Before doing so, please review the selected anniversaries guidelines. If your suggestion is potentially controversial or relates to a day currently or soon to appear on the Main Page, post it on the talk page instead.
Please note:
- Events listed on the Main Page are selected based on article quality and to provide a diverse range of topics, rather than solely on the importance or significance of the events.
- Only four or five events are featured each day; therefore, not all important or significant events can be included.
- An event is generally excluded if it is already the subject of the scheduled featured article or picture of the day.
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- 1520 – Spanish conquest of the Aztec Empire: Conquistadors led by Hernán Cortés (pictured) were nearly annihilated in the Aztec capital of Tenochtitlan, and barely succeeded in escaping by night.
- 1569 – The Union of Lublin was signed, merging the Kingdom of Poland and the Grand Duchy of Lithuania into a single state, the Polish–Lithuanian Commonwealth.
- 1867 – The British North America Act came into effect, uniting the Province of Canada, New Brunswick, and Nova Scotia into the Canadian Confederation.
- 1916 – World War I: The first day of the Battle of the Somme became the bloodiest day in the history of the British Army, with 57,470 casualties of which 19,240 were killed or died of wounds.
- 1997 – The United Kingdom transferred sovereignty of Hong Kong to the People's Republic of China, ending over 150 years of British colonial rule.