Old Calendarists

As Altkalendarier (Greek: Παλαιοημερολογίτες ) is called in the Orthodox Church:

• Those particular Churches which hold to this day for all religious holidays on the Julian calendar, such as the Russian, Belarusian, Ukrainian, Serbian, Macedonian, Georgian and jerusalemitische Church and the monasteries on Mount Athos. They commit all fixed holidays such as Christmas in the period of the years 1900 to 2100 both 13 days later than the Western Churches and the Orthodox Neukalendarier.

• Splinter groups that have separated themselves in protest against the new calendar in the early 20th century by the neukalendarischen particular Churches. Especially in Greece, there is still a number of such groups are not mutually recognize most.

• In contrast to the Altkalendariern are the Neukalendarier who are usually chosen in the early 20th century to Milankovićev calendar.

The altkalendarischen traditions are also other churches connected:

• Various ancient oriental churches such as the Armenian Apostolic Church and the Ethiopian Church. The used in the public Ethiopia Ethiopian calendar is based on the Julian calendar.

• In the non- Catholic " Church of the East " are the Altkalendarier a breakaway part of Catholicos - Patriarch Church under Addai II