How Orthodox Easter is dated
The Orthodox churches keep Easter on the first Sunday after the first full moon on or after the spring equinox, as the Council of Nicaea set it, but reckoned in the Julian calendar. Converted to the calendar on our walls, that puts Pascha between April 4 and May 8. Greece, Cyprus, Romania, Bulgaria, Serbia, Russia, Ukraine, Georgia and the Orthodox around the world celebrate it on the same day. For the Western date, see the Easter countdown.