Editing Reform of the date of Easter (section)

=== 1923 proposal ===

An astronomical rule for Easter was proposed by the 1923 [[Pan-Orthodox Congress of Constantinople]] that also proposed the [[Revised Julian calendar]]: Easter was to be the Sunday after the midnight-to-midnight day at the meridian of the [[Church of the Holy Sepulchre]] in [[Jerusalem]] (35°&thinsp;13′&thinsp;47.2″&thinsp;E or UT&thinsp;+&thinsp;2<sup>h</sup>&thinsp;20<sup>m</sup>&thinsp;55<sup>s</sup> for the small dome over the Greek [[Choir (architecture)|quire]]) during which the first [[full moon]] after the vernal equinox occurs.<ref name="Milankovitch1923">{{cite journal|last1=Milankovitch|first1=M.|title=Das Ende des julianischen Kalenders und der neue Kalender der orientalischen Kirchen|journal=Astronomische Nachrichten |volume=220 |issue=23|year=1923 |pages=379–384|issn=0004-6337 |doi=10.1002/asna.19232202303 |language=de|bibcode=1924AN....220..379M}}</ref><ref name="Shields1924">{{Cite journal | title = The new calendar of the eastern churches | last = Shields | first = Miriam Nancy | journal= Popular Astronomy|volume=32|page=407 | date = 1924 |bibcode=1924PA.....32..407S | quote =  This is a translation of Milankovitch, 1923 }}</ref>

Although the instant of the full moon must occur after the instant of the vernal equinox, it may occur on the same day. If the full moon occurs on a Sunday, Easter is the following Sunday. This proposed astronomical rule was rejected by all Orthodox churches, and was never considered by any Western church.