Orthodox dating easter
Instead, the date for Easter is determined on a lunisolar calendar similar to the Hebrew calendar.
The First Council of Nicaea (325) established two rules, independence of the Jewish calendar and worldwide uniformity, which were the only rules for Easter explicitly laid down by the Council.
Perhaps the earliest extant primary source referring to Easter is a mid-2nd-century Paschal homily attributed to Melito of Sardis, which characterizes the celebration as a well-established one.
He identified the matzah and cup of wine as his body soon to be sacrificed and his blood soon to be shed.However, this does not precisely reflect the ecclesiastical rules.The full moon referred to (called the Paschal full moon) is not an astronomical full moon, but the 14th day of a lunar month.Most Christians refer to the week before Easter as "Holy Week"—it contains the days of the Easter Triduum, including Maundy Thursday, commemorating the Maundy and Last Supper, In Western Christianity, Eastertide, or the Easter Season, begins on Easter Sunday and lasts seven weeks, ending with the coming of the fiftieth day, Pentecost Sunday.In Eastern Christianity, the season of Pascha begins on Pascha and ends with the coming of the fortieth day, the Feast of the Ascension.