October 13 is associated with several feast days, including:

• Saint Gerald of Aurillac: He was a French nobleman who founded a church and abbey on his estate of Aurillac. He died on October 13, probably in 909, and his memorial feast day is celebrated on this date.

• Our Lady of Fatima: This is a Catholic title of the Blessed Virgin Mary based on her appearances to three shepherd children in Fatima, Portugal in 1917. The final public appearance of the Virgin Mary to the children, known as the "Miracle of the Sun," occurred on October 13, 1917. Some Catholic churches celebrate this event with novenas, masses, and other festivities on October 13.

• Saint Edward the Confessor: He was an English king who ruled from 1042 to 1066. His feast day is celebrated on October 13 by some Catholic churches.