[Ansteorra] New Moon

[gail young]

LOL...yes!Especially since I am never REALLY sure exactly when the full moon is!gwyneth
 > Date: Sat, 24 Mar 2012 06:46:25 -0400
> From: galen.of.ockham at gmail.com
> To: InvisibleCollege at yahoogroups.com; ansteorra at lists.ansteorra.org; sca-middle at midrealm.org
> Subject: [Ansteorra] New Moon
> 
>    If you look at a medieval calendar, you'll see a column containing a
>    seemingly random series of Roman numerals. These actually represent the
>    dates of new moons. Like many things in the early calendar, the values
>    are based on a theoretical value rather than the actual astronomical
>    event.
>    The Roman numerals represent the Golden Number for the year. The Golden
>    Number is based on the 19 year Metonic cycle where the solar year and
>    the lunar year coincide. To find the Golden Number for a given year,
>    divide the year by 19, and add one to the remainder. So for 2012,
>    2012/19 gives 105 with a remainder of 17. Adding one to that give a
>    Golden Number of 18. Therefore everywhere you see 'XVIII' on the
>    medieval calendar, that would be the date of the calculated new moon.
>    Today (24 March) is next to XVIII on my re-created medieval-style
>    calendar (see my medievalscience.org website under 'Time' for more
>    information).
>    This new moon is special in the Church calendar. The new moon that
>    falls between March 8 and April 5 (inclusive) heralds the Paschal Full
>    Moon - the first full moon following the Vernal (Spring) Equinox. The
>    full moon is defined as occurring 15 days (Roman inclusive counting -
>    we'd say 14 days using modern counting) after the new moon. The first
>    Sunday following the the Paschal Full Moon is Easter.
>    So counting forward from today, the Paschal Full Moon occurs on April
>    7, making April 8 Easter.
>    Aren't you glad all you have to do to find the date of Easter is look
>    at a calendar?
> 
>    --
> 
>    Magister Galenus Ockhamnesis
>    Friar Galen of Ockham, OP
>    A Study in Natural Philosophy: [1]http://medievalscience.org
>    Chirurgeon's Point: [2]http://chirurgeon.org
> 
>    xb
> 
> References
> 
>    1. http://medievalscience.org/
>    2. http://chirurgeon.org/
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