Why Does Easter Change Every Year but Christmas Stays on December 25?

Discover why Easter's date varies annually based on lunar phases while Christmas remains fixed on December 25th every year.

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Easter's date varies each year because it is determined using a combination of the Gregorian calendar and lunar phases. Specifically, Easter falls on the first Sunday after the first full moon occurring on or after the spring equinox. In contrast, Christmas is fixed on December 25th annually, adhering strictly to the Gregorian calendar, without any lunar calculations involved.

FAQs & Answers

  1. How is the date of Easter calculated each year? Easter is determined as the first Sunday after the first full moon occurring on or after the spring equinox, combining lunar phases with the Gregorian calendar.
  2. Why is Christmas always on December 25th? Christmas is fixed on December 25th according to the Gregorian calendar and does not rely on lunar cycles, making its date consistent every year.
  3. What is the spring equinox and why does it matter for Easter? The spring equinox is when day and night are approximately equal; Easter is set to fall after the first full moon on or after this date, linking it to natural celestial events.

Watch More

If you're interested in learning more about how holidays are scheduled and their cultural significance, check out our related videos on calendar history and other movable feasts like Thanksgiving and Ramadan.

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