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Leap year
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==Coptic and Ethiopian calendars== The [[Coptic calendar]] has 13 months, 12 of 30 days each, and one at the end of the year of 5 days, or 6 days in leap years. The Coptic Leap Year follows the same rules as the Julian Calendar so that the extra month always has 6 days in the year before a Julian Leap Year.<ref name = FrTadros>{{citation |author=Fr Tadros Y Malaty |date=1988 |title=The Coptic Calendar and Church of Alexandria. |url=http://www.coptics.info/NEW_ARTICLES2/Others/Z_done/The_Coptic_Calendar_And_The_Church_Of_Alexandria.docx |publisher=The Monastery of St. Macarius Press, The Desert of Scete |access-date=13 September 2022 |archive-date=13 September 2022 |archive-url=https://web.archive.org/web/20220913010235/http://www.coptics.info/NEW_ARTICLES2/Others/Z_done/The_Coptic_Calendar_And_The_Church_Of_Alexandria.docx |url-status=usurped}}</ref> The [[Ethiopian calendar]] has 12 months of 30 days plus 5 or 6 [[intercalation (timekeeping)|epagomenal days]], which comprise a 13th month.<ref>{{Citation |date=10 September 2021 |title=Ethiopia: The country where a year lasts 13 months |language=en-GB |work=BBC News |url=https://www.bbc.com/news/world-africa-57443424 |access-date=17 September 2022 |archive-date=18 September 2022 |archive-url=https://web.archive.org/web/20220918194518/https://www.bbc.com/news/world-africa-57443424 |url-status=live }}</ref>
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