Feast of Saint Bartholomew
The Feast of Saint Bartholomew, also known as Saint Bartholomew's Day, is a Christian liturgical celebration of Bartholomew the Apostle which occurs yearly on August 24 of the liturgical calendars of the Catholic Church and the Church of England. The Eastern Orthodox liturgical calendar commemorates James on June 11.
Source: Wikipedia — Feast of Saint Bartholomew (CC BY-SA 4.0)