September 15th the 258th day of the year (259th in leap years) in the Gregorian calendar. There are 107 days remaining until the end of the year. This date is slightly more likely to fall on a Tuesday, Thursday or Saturday (58 in 400 years each) than on Sunday or Monday (57), and slightly less likely to occur on a Wednesday or Friday (56).

On this day in history:

1835– HMS Beagle, with Charles Darwin aboard, reaches the Galápagos Islands. The ship lands at Chatham or San Cristobal, the easternmost of the archipelago.

1916– World War I: Tanks are used for the first time in battle, at the Battle of the Somme.

1935 – The Nuremberg Laws deprive German Jews of citizenship.

1935 – Nazi Germany adopts a new national flag bearing the swastika.

1962 – The Soviet ship Poltava heads toward Cuba, one of the events that sets into motion the Cuban Missile Crisis.

1963 – 16th Street Baptist Church bombing: Four children killed in the bombing of an African-American church in Birmingham, Alabama, United States.

Celebrity Birthdays:

Actor and Producer Tom Hardy turns 40

Prince Harry turns 33

Actor and Filmmaker Tommy Lee Jones turns 71

American YouTuber Jenna Marbles turns 31

Television Personality Heidi Montag turns 31

Happy Birthday to all September 15th babies!