Wikipedia:Selected anniversaries/October 9
This is a list of selected October 9 anniversaries that appears on 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. Please read the selected anniversaries guidelines before making your edit. However, if your addition might be controversial, or on a day that is or soon will be on the Main Page, please post your suggestion on the talk page instead.
Please note that the events listed on the Main Page are chosen based more on relative article quality and to maintain a mix of topics, not based solely on how important or significant their subjects are. Only 5–6 events are posted at a time and thus not everything that is "most important and significant" can be listed. In addition, an event is not generally posted this year if it is also the subject of the scheduled October 9, 2018 featured article or the October 9, 2018 featured picture.
To report an error when this appears on the Main Page, see Main Page errors. Please remember that this list defers to the supporting articles, so it is best to achieve consensus and make any necessary changes there first.
- 1594 – Sinhalese–Portuguese War: Portugal had almost conquered the island of Sri Lanka when its army was completely annihilated, ending the Campaign of Danture.
- 1874 – The Universal Postal Union, then known as the General Postal Union, was established with the signing of the Treaty of Bern to unify disparate postal services and regulations so that international mail could be exchanged freely.
- 1942 – World War II: American forces defeated the Japanese at the Third Battle of the Matanikau in Guadalcanal, Solomon Islands, reversing the Japanese victory a couple of weeks earlier.
- 1986 – The Phantom of the Opera, a musical by Andrew Lloyd Webber currently the longest-running Broadway show in history, opened in London's West End.
- 2012 – Pakistani activist Malala Yousafzai (pictured) was severely injured by a Taliban gunman in a failed assassination attempt.