October 13 is the 286th day of the year (287th in leap years) in the Gregorian calendar. Here are some facts related to October 13:

• Events: On this day in history, 33 miners emerged to the surface in Copiapó, Chile after being trapped for a record 69 days underground; Ankara became the capital of Turkey, and Bnai Brith, the oldest Jewish service organization in the world, was founded in New York City.

• Birthdays: Famous birthdays on October 13th include Margaret Thatcher and singer Paul Simon.

• Holidays: October 13 is National No Bra Day, National Fossil Day, and International Civility For the Girl Child Day. It is also the U.S. Navy Birthday. Other holidays that fall on October 13, 2023, include National Train Your Brain Day, National Transfer Money to Your Son Day, World Egg Day, Vet Nurse Day, and National M&M Day.

• Astrological Sign: The astrological sign for October 13 is Libra, which spans from September 23 to October 23.

• Birth Flower: The birth flower for the month of October is marigold.

• Birthstone: The birthstone for October is opal and tourmaline.

• Daily Holidays: There are several daily holidays that fall on October 13, including National No Bra Day, National Fossil Day, and International Civility For the Girl Child Day.