Calculating the Easter Date
The date of Easter Day is usually the first Sunday after the first Full Moon occurring on or after the March equinox.
Easter Sunday celebrates the Christian belief of Jesus Christ's resurrection. The Easter date is set around the time of the March Equinox.
Setting the Easter Date
The March equinox coincides with Easter Sunday and holidays that are related to it. These holidays do not fall on a fixed date in the Gregorian calendar, or the Julian calendar, which is still used by many Orthodox Christian churches.