When is Easter?

Oliver Brown
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I wrote a post about calendar reuse that included an offhand comment about Easter. The common definition of when Easter is, is:

the first Sunday after the first full moon that falls on or after the vernal equinox

That isn’t quite right, and I made a vague mention of the correct definition.

Since then, someone has made a video explaining the the correct definition in depth with details about the history and why it is this way.

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