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In 325 CE, the Council of Nicaea, a gathering of Christian bishops, decided that there should be a more organized and universal way to decide when Easter would be celebrated, the AJC previously reported.
They decided that the holiday would be held the first Sunday after the first full moon occurring on or after the spring equinox, which always occurs on March 21.
If the full moon falls on a Sunday, Easter is delayed a week.
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Why does the date change each year?
The date of Easter changes, because the Paschal full moon can fall on various days in different time zones.
But because Easter falls on a Sunday after the March 21 spring equinox, it will always occur on a Sunday between March 22 and April 25. That’s also why Easter and Christian holidays leading up to that day, such as Ash Wednesday, Palm Sunday and Good Friday, are referred to as “moveable feasts.”
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Do Christians celebrate Easter Sunday on the same day?
According to Encyclopedia Brittanica, the Eastern Orthodox typically celebrate Easter Sunday later than Protestants and Roman Catholics. That's because Eastern Orthodox churches didn't adopt the Gregorian calendar method and instead follow the Julian calendar, a solar calendar adopted by Julius Caesar in 45 BC, which is 13 days ahead of the Gregorian calendar.
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When was Easter 2018?
Last year, Easter Sunday fell on April 1.
When will Easter 2020 be?
Next year, Easter Sunday will fall on April 12.