Wikipedia:Selected anniversaries/September 25
- 1066 - King Harold Godwinson of England and his army defeated a Norwegian army under King Harald Hardråde at the Battle of Stamford Bridge outside the city of York, marking the end of Viking invasions from Scandinavia.
- 1890 - As envisioned by John Muir, the Yosemite National Park in California was established.
- 1955 - The Royal Jordanian Air Force was founded.
- 1962 - The People's Democratic Republic of Algeria was formally proclaimed, and Ferhat Abbas was elected the President of the provisional government.
- 1996 - The last Magdalen Asylum in Ireland was closed.
Recent days: September 24 – September 23 – September 22