Wikipedia:Selected anniversaries/September 15
September 15: Independence Day for Costa Rica, Guatemala, Honduras, Nicaragua and El Salvador (all 1821); Rosh Hashanah, 5765 begins at sunset (2004)
- 1916 - Tanks, the "secret weapons" of the British Army during World War I, were first used in combat at the Battle of the Somme.
- 1935 - Nazi Germany adopted the Nuremberg Laws, which deprived German Jews of citizenship, and a new national flag with the Swastika.
- 1950 - Incheon Landing: United States forces landed at Incheon, Korea.
- 1952 - United Nations gave Eritrea to Ethiopia.
- 1963 - A bomb exploded in the 16th Street Baptist Church, an African-American church in Birmingham, Alabama, killing several children.
Recent days: September 14 – September 13 – September 12