Dear Helios and Calendar People
The formula for the mean solar yerm is very similar to that for a mean
term yerm:
mean term-yerm = 1 / [ ( 732 / Y ) - 2 ]
It's the same but with 732 instead of 731.
A term is a period of 21 or 22 days arranged into term yerms so that an
odd-number term has 21 days and an even-number term has 22 days. There
are also exactly 17 terms to a year. If all term yerms were to have 33
terms, then a 33-year cycle of 8 leap years would result from 17 term
yerms. All these term yerms would have 709 days.
24 lunar months have about 708.734 days, so it is tempting to put in a
few shorter 31-term term yerms to make the mean term-yerm equal to 24
months, but I don't see any benefit in this.
Karl
10(06(15
-----Original Message-----
From: East Carolina University Calendar discussion List
[mailto:
CALNDR-L@...] On Behalf Of Helios
Sent: 11 March 2009 12:31
To:
CALNDR-L@...
Subject: Solar Month Count
Yes, along these lines, I used the formula ( with Y = mean year )
mean term-yerm = 1 / [ ( 731 / Y ) - 2 ]
and set this to exactly 24 months.
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