Julian and Gregorian Calendars: What the Change Caused in Greece
In early 1923, Greece transitioned from the Julian calendar to the Gregorian calendar, resulting in a 13-day shift in dates for its residents.
Why Orthodox Serbs Celebrate Christmas Today, and Not on December 25?
Orthodox Christmas is celebrated on January 7 due to the use of the Julian calendar for liturgical purposes, despite many Orthodox countries adopting the Gregorian calendar in the 20th century.