Historic Events That Occurred On December 25

December 25 is Christmas Day, when billions of Christians across the globe celebrate the birth of Jesus Christ. Though Christmas is likely the first thing people think of when December 25 comes around, over the years many additional memorable and even infamous events unrelated to the holiday have taken place on this unique day on the calendar.

• 333: The Roman Emperor Constantine elevates his youngest son, Constans, to the rank of Caesar. This designation establishes Constans as Constantine’s heir apparent.