jgress wrote:In 1983, the Old Calendarists celebrated Pascha on April 25, but the New Calendarists on May 08. Do you see what I'm getting at now?
Pascha must always fall on the first Sunday after the first full moon on or after the vernal equinox. Of course, this calculation will depend on when you believe the vernal equinox is. That is always March 21 on whichever calendar you use, but the calendars differ on which day to assign March 21. The New Calendarists chose to align their March 21 with the Gregorian reckoning, but then they continue to celebrate Pascha with the Old Calendarists. But this means that, according to their own reckoning, Pascha can now fall as late as May 08, and simultaneously can never fall before April 4, i.e. it is no longer always on the first Sunday after the full moon on or after the vernal equinox. The disruptions to the Typicon are well known, e.g. St George's often now falls well before Pascha, even though the service for the Great Martyr is filled with references to Paschal joy, which are inappropriate during Lent and Holy Week. But even aside from this, this mixed calendar violates the injunctions of the Council of Nicea.
In principle, the Church as a whole might decide to change the day She assigns to be the vernal equinox. But Local Churches can't do this on their own, as the State Churches of Greece, Romania, Bulgaria, etc have done.
Doesn't only one New Calendarist jurisdiction (Finland) always celebrated Pascha with the Western Churches?
While all of the New Calendarists in the USA (for example, the Greek Orthodox Archdiocese of America and Antiochians) calculate Pascha using the Old Calendar they observe the New Calendar feast days. For example, next year Pascha falls on April 15, 2012, but the Finnish Orthodox Church and Western Christians will celebrate Easter on April 08, 2012, one week earlier. However, even though both the GOC and the Antiochians celebrate April 15 as the Pascha, the GOC will commemorate Venerable Titus while the Antiochians will commemorate Aristoarch and Pudens (of 70), St. Leonidas of Athens, and Martyr Sabbas the Goth (a 13 days difference).
I guess a better example is Christmas. Both the Finnish, the Greek Orthodox Church of America, and the Antiochians will celebrate Christmas Day on December 25, 2011, while the GOC will celebrate the Nativity of the Lord on January 7, 2012.
The MP and Serbians, although both follow the Old Calendar, are in communion with the EP. So, it is not only the Old Calendar which distinguishes churches, but who is in communion with whom as the GOC is not in communion with the EP, GOARCH, OCA, Antiochians, or the MP.