Christmas

=== Table of dates ===
There are four different dates used by different Christian groups to mark the birth of Christ, given in the table below.

{| class="wikitable"
|-
! Church or section
! Calendar
! Date
! Gregorian date
! Note
|-
| [[Armenian Patriarchate of Jerusalem]]
| Julian calendar
| January 6
| January 19
| Correspondence between Julian January 6 and Gregorian January 19 holds until 2100; in the following century the difference will be one day more.
|-
| [[Armenian Apostolic Church]], [[Armenian Evangelical Church]]
| Gregorian calendar
| January 6
| January 6
|
|-
| [[Eastern Orthodox Church]] jurisdictions, including those of [[Ecumenical Patriarchate of Constantinople|Constantinople]], [[Bulgarian Orthodox Church|Bulgaria]], [[Ukraine]]<ref name="bbc-ukr-dec-25">{{cite web|title=Ukraine moves Christmas Day in snub to Russia|url=https://www.bbc.co.uk/news/world-europe-66341617|date=July 28, 2023|access-date=July 28, 2023|first=Jaroslav|last=Lukiv|language=en|website=BBC News}}</ref> (state holiday, [[Orthodox Church of Ukraine|Orthodox]] and [[Ukrainian Greek Catholic Church|Greek Catholic]]), [[Church of Greece|Greece]], [[Romanian Orthodox Church|Romania]], [[Greek Orthodox Church of Antioch|Antioch]], [[Greek Orthodox Church of Alexandria|Alexandria]], [[Orthodox Autocephalous Church of Albania|Albania]], [[Church of Cyprus|Cyprus]], [[Finnish Orthodox Church|Finland]], the [[Orthodox Church in America]].
Also, the [[Ancient Church of the East]], [[Syriac Orthodox Church]], [[Malankara Orthodox Syrian Church|Indian Orthodox Church]].
| [[Revised Julian calendar]]
| December 25
| December 25
| Revised Julian calendar was agreed at the 1923 Council of Constantinople.<ref name ="nationalgeographic"/>
Although it follows the Julian calendar, the Ancient Church of the East decided on 2010 to celebrate Christmas according to the Gregorian calendar date.
|-
| Other Eastern Orthodox: [[Russian Orthodox Church|Russia]], [[Georgian Orthodox Church|Georgia]], [[Ukrainian Orthodox Church (Moscow Patriarchate)]], [[Macedonian Orthodox Church|Macedonia]], [[Belarusian Orthodox Church|Belarus]], Moldova, Montenegro, [[Serbian Orthodox Church|Serbia]] and [[Eastern Orthodox Patriarchate of Jerusalem|Jerusalem]].
Also, some [[Greek Byzantine Catholic Church|Byzantine Rite Catholics]] and [[Byzantine Rite Lutheranism|Byzantine Rite Lutherans]].
| Julian calendar
| December 25
| January 7
| Correspondence between Julian December 25 and Gregorian January 7 of the following year holds until 2100; from 2101 to 2199 the difference will be one day more.{{citation needed|date=December 2020}}
|-
| [[Coptic Orthodox Church]]
| [[Coptic calendar]]
| [[Koiak]] 29 or 28 (December 25)
| January 7
| After the Coptic insertion of a leap day in what for the Julian calendar is August (September in Gregorian), Christmas is celebrated on Koiak 28 in order to maintain the exact interval of nine 30-day months and 5 days of the child's gestation.{{citation needed|date=December 2020}}
|- id="Genna"
| [[Ethiopian Orthodox Tewahedo Church]] (sole date), [[Eritrean Orthodox Tewahedo Church]] (sole date), and [[P'ent'ay|P'ent'ay (Ethiopian-Eritrean Evangelical) Churches]] (primary date)
| [[Ethiopian calendar]]
| [[Ethiopian Calendar|Tahsas]] 29 or 28 (December 25)
| January 7
| {{Further|Ethiopian Christmas}}After the Ethiopian and Eritrean insertion of a leap day in what for the Julian calendar is August (September in Gregorian), Christmas (also called Liddet or Gena, also Ledet or Genna)<ref>[http://ethiopianorthodox.org/english/calendar.html The Ethiopian Orthodox Tewahedo Church Faith and Order - Religious Holidays and Calendar] {{Webarchive|url=https://web.archive.org/web/20211029183552/http://www.ethiopianorthodox.org/english/calendar.html |date=October 29, 2021 }}></ref> is celebrated on Tahsas 28 in order to maintain the exact interval of nine 30-day months and 5 days of the child's gestation.<ref>Siegbert Uhlig, ''Encyclopaedia Aethiopica'' He-N, p. 538</ref>
Most Protestants ([[P'ent'ay]]/Evangelicals) in the diaspora have the option of choosing the [[Ethiopian calendar]] ([[Ethiopian Calendar|Tahsas]] 29/January 7) or the [[Gregorian calendar]] (December 25) for religious holidays, with this option being used when the corresponding [[Eastern Christianity|eastern celebration]] is not a public holiday in the western world (with most diaspora Protestants celebrating both days).{{citation needed|date=January 2020}}
|-
| Most [[Western Christianity|Western Christian churches]], most [[Eastern Catholic churches]] and civil calendars; also the [[Assyrian Church of the East]].
| Gregorian calendar
| December 25
| December 25
| The Assyrian Church of the East adopted the Gregorian calendar in 1964.
|}