Saint Stephen's Day, also called the Feast of Saint Stephen, is a Christian saint's day to commemorate Saint Stephen, the first Christian martyr or protomartyr, celebrated on 26 December in Western Christianity and 27 December in Eastern Christianity. The Eastern Orthodox churches that adhere to the Julian calendar mark Saint Stephen's Day on 27 December according to that calendar, which places it on 9 January of the Gregorian calendar used in civil contexts. In Western Christian denominations, Saint Stephen's Day marks the second day of Christmastide.