Reform of the date of Easter

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The current system for determining the date of Easter is often seen as presenting two significant problems:

Its date varies from year to year (by the Western system of calculation, it can fall on any of 35 different dates of the Gregorian calendar). While many Christians do not consider this to be a problem, it can cause frequent difficulties of co-ordination with civil calendars, for example academic terms. Many countries have public holidays around Easter weekend.
The Eastern and Western Christian churches use different methods of determining its date, and hence in most years Easter is celebrated on a different date in the two major branches of the Church.

It has been proposed that the first problem could be resolved by making Easter occur on a fixed date every year, or alternatively on a Sunday within a fixed range of seven dates. While tying it to one fixed date would serve to underline the belief that Easter commemorates an actual historical event, it would also break the tradition of Easter always being on a Sunday, established by the First Ecumenical Council at Nicaea in AD 325 and by now deeply embedded in the liturgical practice and theological understanding of almost all Christian denominations.

The two most widespread proposals for fixing the date of Easter would set it on either the second Sunday in April (8th to 14th), or the Sunday after the second Saturday in April (9th to 15th). In both schemes, account has been taken of the fact that—in spite of the many difficulties in establishing the dates of the historical events involved—many scholars attribute a high degree of probability to Friday April 7, 30, as the date of the crucifixion of Jesus, which would make April 9 the date of the Resurrection. Many churches, including the Roman Catholic Church, have stated that they have no objection in principle to fixing the date of Easter in this way, but no serious discussions have yet taken place on implementing such a change.

Proposals to resolve the second problem have made greater progress, but they are yet to be adopted. The World Council of Churches proposed a reform of the method of determining the date of Easter at a summit in Aleppo, Syria, in 1997^[1]: Easter would be defined as the first Sunday following the first astronomical full moon following the astronomical vernal equinox, as determined from the meridian of Jerusalem. The reform would have been implemented starting in 2001, since in that year the Eastern and Western dates of Easter would coincide.

This reform has not been implemented. It would have relied mainly on the co-operation of the Eastern Orthodox Church, since the date of Easter (known as Pascha in the Orthodox calendar) would change for them immediately; whereas for the Western churches the new system would not differ from that currently in use until 2019. However, Eastern Orthodox support was not forthcoming, and the reform failed. The much greater impact that this reform would have had on the Eastern churches in comparison with those of the West led some Orthodox to suspect that the WCC's decision was an attempt by the West to impose its viewpoint unilaterally on the rest of the world under the guise of ecumenism.

Interestingly, when some Eastern Orthodox national churches adopted the Revised Julian calendar in the 1920s, they adopted a somewhat similar astronomical system for determining the date of Easter. However, that system was almost never implemented in practice as it would have been contradictory to church edicts dating from the 16th century, which specify that all Orthodox are to celebrate the feast on the same day.