Easter europen dating
Eastern Christianity bases its calculations on the Julian Calendar.
Because of the 13-day difference between the calendars between 19, 21 March corresponds, during the 21st century, to 3 April in the Gregorian Calendar.
Easter therefore varies between 4 April and 8 May in the Gregorian calendar (the Julian calendar is no longer used as the civil calendar of the countries where Eastern Christian traditions predominate).
By the Roman period, however, the sacrifices were performed in the mid-afternoon.
Direct evidence for a more fully formed Christian festival of Pascha (Easter) begins to appear in the mid-2nd century.
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.
The ecclesiastical historian Socrates Scholasticus attributes the observance of Easter by the church to the perpetuation of its custom, "just as many other customs have been established", stating that neither Jesus nor his Apostles enjoined the keeping of this or any other festival.
Although he describes the details of the Easter celebration as deriving from local custom, he insists the feast itself is universally observed.