Christian calendar

List of Christian liturgical calendars, calendars used by predominantly Christian communities or countries, and calendars referred to as the "Christian calendar."

• Gregorian calendar, internationally accepted civil calendar used in Western Christendom
• Armenian calendar, used by Armenian Christians and Churches
• Coptic calendar, Egyptian liturgical calendar (also known as the Alexandrian calendar) used by Coptic Christians and Churches
• Ethiopian calendar, principal calendar used in Ethiopia and Eritrea (also known as the Ge'ez calendar or Eritrean calendar)
• Julian calendar, calendar introduced by Julius Caesar used in most of Eastern Christian churches
  • Revised Julian calendar, calendar used by some Eastern Orthodox churches
• Liturgical year, annually recurring fixed sequence of Christian feast days