Full Moon Predictions ```Name: julie e larsen Status: N/A Age: N/A Location: N/A Country: N/A Date: 1993 - 1999 ``` Question: I would like some help in finding out about the golden number for predicting or calculating the full moon and Easter. The Encyclopedia Britannica says to find it by adding 1 to the calendar year (AD) and dividing it by 19, the remainder being the golden number. If there is no remainder, the number is 19. O nce the number has been calculated, how does one use it? What does one do with it to arrive at the full moon date? Replies: I read the Britannica write-up and it is not at all clear what you're supposed to do. I got the following from an insert that came with my desk calendar: Easter falls on the first Sunday following the arbitrary Paschal Full Moon, which does not necessarily coincide with a real or astronomical full moon. The Paschal Full Moon is calculated by adding 1 to the remainder obtained by dividing the year by 19 and applying the following table: ```1 - Apr 14 5 - Mar 31 9 - Apr 16 13 - Apr 2 17 - Apr 17 2 - Apr 3 6 - Apr 18 10 - Apr 5 14 - Mar 22 18 - Apr 7 3 - Mar 23 7 - Apr 8 11 - Mar 25 15 - Apr 10 19 - Mar 27 4 - Apr 11 8 - Mar 28 12 - Apr 13 16 - Mar 30 ``` The date you get from the above table is this so-called Paschal Full Moon; it may be a day or two off from the astronomical full moon. So for this year the "key" is 1; Apr 14 is a Friday, so Easter is Apr 16. The article doesn't say what the range of years is to which this method applies; I would hesitate to apply it except for years in the 19th, 20th, and 21st centuries. RC Winther Click here to return to the Astronomy Archives

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