C is always set between 19 and 20 April. The numbers are moved from time to time, and when they do move it's before Easter in years which are exactly divisible by 100. There are two separate movements: 1. The 'solar correction': the numbers move DOWN a day every time a centennial leap year is dropped (eg 2100) 2. The 'lunar correction': the numbers move UP a day in years giving remainder 200, 500, 800, 1100, 1400, 1800, 2100 and 2400 on division by 2500 (eg 2100). Sometimes the corrections cancel out - thus in 2100 the numbers stay where they are. For Orthodox Easter the instructions for Groups B and C are ignored. Easter is, from the last lunar correction in 1800 to the year before the next lunar correction in 2100, the Sunday after the Wednesday following the date given by the table current for the relevant century. From 2100 until the year before the following lunar correction (in 2400) replace 'Wednesday' by 'Tuesday', and so on. Example calculation On what date does Orthodox Easter fall in 2023? 2023 + 1 = 2024 2024/19 = 106 remainder 10 Sunday Letter for 2023 is A 10 stands against 5 April The nearest 'A' day is 2 April. Therefore, 2 April is Sunday and 5 April is Wednesday The following Wednesday is 12 April The following Sunday is 16 April Orthodox Easter is 16 April. What the prospects are for this method being implemented Page 5 of the document notes: In the middle east even the Latin rite Catholics and Protestant churches have been observing Orthodox Easter since 1975, and in January 2016 Bishop Mouneer Anis (as he then was) reaffirmed this for Anglicans in Arabia (including the Gulf States), Cyprus, Egypt with North Africa and the Horn of Africa, Iraq, Israel (including occupied territories), Jordan, Lebanon, Persia and Syria. Page 6 notes: In 1900 the Macedonian-born academic Maksim Trpkovic published at Belgrade his Reforma Kalendara (Calendar Reform). Based on Barnaba Oriani's proposed reform which became the state calendar of Greece [references cited] it featured epact calculations for the twentieth century and new paschal limits in the 19-year cycle of golden numbers, after which the dates of the new moons repeat. In 1903 the Holy Synod of the Greek Orthodox Church wrote to the Oecumanical Patriarch stating that the Julian calendar would be preserved. Page 8 notes: The Congress deliberated