Who Determined the Date of Easter and How Is It Calculated?

Discover who set the date of Easter and learn how it's calculated based on the Council of Nicaea's 325 AD decision.

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The date of Easter is determined by a calculation established by the Council of Nicaea in 325 AD. It falls on the first Sunday after the first full moon occurring on or after the vernal equinox. This determination combines both solar and lunar calendars to calculate Easter Sunday, making its date vary between March 22 and April 25.

FAQs & Answers

  1. How is the date of Easter determined each year? Easter is celebrated on the first Sunday after the first full moon that occurs on or after the vernal equinox, as established by the Council of Nicaea in 325 AD.
  2. What role did the Council of Nicaea play in setting Easter's date? The Council of Nicaea in 325 AD established the rule that Easter would be observed on the first Sunday after the first full moon following the vernal equinox to unify Christian celebration dates.
  3. Why does the date of Easter change every year? Because Easter is based on a combination of solar and lunar calendars—the vernal equinox and the lunar cycle—its date varies between March 22 and April 25.