Christmas Day
Christmas Day is one of the biggest Christian celebrations and falls on December 25 in the Gregorian calendar.
Elsewhere on timeanddate.com
Orthodox Easter Sunday
Millions of Orthodox Christians around the world often celebrate Easter Sunday at a different time to the date set by many western churches.
Orthodox Easter Monday
Orthodox Easter Monday is the day after the Orthodox Easter Sunday.
AM and PM Explained
How does the 12-hour clock system work? Is midnight 12 am or 12 pm?