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), it is also used as a liturgical calendar by Ethiopian and Eritrean Christians.
• Julian calendar – Calendar introduced by Julius Caesar – used in most of Eastern Christendom
  • Revised Julian calendar – Calendar used by some Eastern Orthodox churches (also known as the Milanković calendar)
• Liturgical year – Annually recurring fixed sequence of Christian feast days