Wikipedia:Selected anniversaries/December 15
- 1467 – Troops under Stephen III of Moldavia defeated the forces of Matthias Corvinus of Hungary at the Battle of Baia in Baia, present-day Romania.
- 1791 – The first ten amendments to the United States Constitution, collectively known as the United States Bill of Rights, were ratified.
- 1891 – Physical education teacher James Naismith introduced a game in Springfield, Massachusetts, USA with thirteen rules and nine players on each team that became known as basketball (pictured).
- 1961 – Former Nazi leader Adolf Eichmann was sentenced to death after being found guilty on fifteen criminal charges, including war crimes and crimes against humanity.
- 1964 – The six-month long Canadian Great Flag Debate ended when the Canadian House of Commons voted to replace the de facto national flag of Canada, the Canadian Red Ensign, with an official one, the current Maple Leaf Flag.
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