Re: EASTER NUT

On Mar 23, 2:28 pm, Chip Eastham <hardm...@xxxxxxxxx> wrote:
On Mar 23, 6:38 am, "Nameless" <news.m...@xxxxxxxxxx> wrote:

In some countries (particularly the Scandinavian ones) it
is traditional to solve puzzles/problems (= nuts) at Easter
time. Here's one which might be of interest to some readers.

The earliest possible (Gregorian) Easter Sunday falls this
year (2008). In what next 10 years does this recur again?
Please feel free to display the code/link of the Prolog
program used to compute these years. ;-)

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Easter, as determined by the ecclesiastical rules
of Western Christianity, is the first Sunday after
the first full moon on or after March 21st (the
vernal equinox for purposes of this rule). The
earliest possible date for Easter in the Western
church is therefore March 22nd, and we came close
this year without attaining that limit.

It seems to me the difficulty of determining the
dates of the full moons outweigh any interest in
how Prolog might be used to encode the logic of
this definition. Perhaps an astronomy newsgroup
would be more suitable for this "nut"?

regards, chip

Here's a nice site if someone wants to look
into the details of the "ecclesiastical full
moon":

http://users.sa.chariot.net.au/~gmarts/easter.htm

If we're only checking the next 10 years, then
of course a lookup table for these dates is not
all that tedious.

regards, chip
.

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