”Easter Sunday falls on the Sunday after the first full moon following the Spring equinox in March.”
Orthodox Christians would disagree.
Please dont’ get into a pi$$ing contest on which day Christ resurrected. The important thing is that he did. Happy Resurrection Day! I prefer that term as Easter has been coopted for nefarious reasons.
No they don’t. They just disagree on when the spring equinox is ... March 21 (Julian) vs the West’s March 21 (Gregorian).