Analysis of information sources in references of the Wikipedia article "Coptic calendar" in English language version.
The Coptic date of Easter is determined by a calculation based on the Alexandrian 19-year cycle, which synchronises the lunar months with the solar years of the Coptic calendar.
The Coptic date of Easter is determined by a calculation based on the Alexandrian 19-year cycle, which synchronises the lunar months with the solar years of the Coptic calendar.