Dear Roger, I note that you say:
> My reference on this topic is The Sun in > the Church by J L Heilbron. He is pretty sound on this and, as early as page 3, notes that the time of the equinox and the time of full moon depend where you are on the planet. He adds, "as, of course does Sunday". If everyone used the Julian Date then they might all agree on the instant of the equinox and the instant of full moon but it seems most unlikely that they would have similar agreement as to what is meant by "Sunday". It takes 48 hours from the start of a given Sunday, just to the west of the International Date Line, to the end of the same Sunday, just to the east of the Line. Fabio has pointed out that Rome and Jerusalem have been suggested as candidate places for defining a Canonical Sunday. I too have read this but I don't know where the supposed primary source is. I think Fabio's explanation is the most plausible. In essence, you define an algorithm (albeit one that is a bit suspect) and impose a kind of ANSI Standard Easter :-) As a former colleague once told me: "The great thing about having Standards is that there are so many of them." You are one of the most-westerly subscribers to this list so I think a Bailey-Standard Easter would be worth lobbying for. You might thereby become a noted Holy Man. Be careful! Very best wishes Frank --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
