why does easter change
Easter changes because it is a moveable feast , not a fixed-date holiday. In most Western Christian traditions, it is celebrated on the first Sunday after the first full moon on or after the spring equinox , which is why it can fall anywhere from March 22 to April 25.
Quick Scoop
The date shifts because Easter is tied to both the solar calendar and the lunar cycle. That old system was used to connect Easter with Passover and early church traditions, so the holiday does not stay on the same day each year.
Why it feels random
A simple way to think about it:
- The church waits for the spring equinox.
- Then it looks for the first full moon after that.
- Easter is the next Sunday after that full moon.
That is why one year Easter may be in late March, and the next year it may be deep into April.
One more wrinkle
Eastern Orthodox churches often calculate Easter differently because they use a different calendar system, so Orthodox Easter can land on a different Sunday than Western Easter.
If you want, I can also give you a 1-sentence version or a kid-friendly explanation.