<Tr> <Th> Church or section </Th> <Th> Date </Th> <Th> Calendar </Th> <Th> Gregorian date </Th> <Th> Note </Th> </Tr> <Tr> <Td> Armenian Patriarchate of Jerusalem </Td> <Td> January 6 </Td> <Td> Julian calendar </Td> <Td> January 19 </Td> <Td> Correspondence between Julian January 6 and Gregorian January 19 holds until 2100; in the following century the difference will be one day more . </Td> </Tr> <Tr> <Td> Armenian Apostolic Church, Armenian Catholic Church </Td> <Td> January 6 </Td> <Td> Gregorian calendar </Td> <Td> January 6 </Td> <Td> </Td> </Tr> <Tr> <Td> Eastern Orthodox Church jurisdictions, including those of Bulgaria, Greece, Romania, Constantinople, Antioch, Alexandria, Albania, Cyprus, and the Orthodox Church in America </Td> <Td> December 25 </Td> <Td> Revised Julian calendar </Td> <Td> December 25 </Td> <Td> Revised Julian calendar usage started in the early 20th century </Td> </Tr>

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