system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How is Easter's date determined?

And why does it change so much every year, sometimes from late March to late April?
gpt
It is always on the first Sunday after the first full moon after the equinox in March. This is to make sure that it is always after the Jewish holiday Passover because you can't have his death and resurrection celebrations occur before his last supper which was on Passover.