adam@MATH.UCLA.EDU (02/17/88)
Does anyone know of a formula to find the Islamic New Year
and the Chinese New Year? Thanks.
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Adam H. Lewenberg
UCLA-Mathnet; 3921 MSA; 405 Hilgard Ave.; Los Angeles, CA 90024-1555
UUCP:...!{ihnp4,ucbvax,sdcrdcf,{hao!cepu}}!ucla-cs!math.ucla.edu!adam
ARPA: adam@math.ucla.edu BITNET: adam%math.ucla.edu@WISCVMleonard@bucket.UUCP (Leonard Erickson) (02/24/88)
In article <9485@shemp.CS.UCLA.EDU> adam@MATH.UCLA.EDU (Adam H. Lewenberg) writes:
<Does anyone know of a formula to find the Islamic New Year
<and the Chinese New Year? Thanks.
I have some *very* bad news for you. The Islamic calendar determines the start
of the month by when the new moon is first seen. This means that no matter
*how* you calculate it, you are liable to be plus or minus one day in the
real world.
Check the Brittanica. I seem to recall an article there (under "calendars")
that gave the pattern of years and the like. As you can see from the above
comment, the months are *strictly* lunar (so get a "phase of moon" program)
and the years are 12 and 13 months long following a 19(?) year cycle....
If you get anything for either, let me know! I once planned to write some
code for converting various calendars, but never finished it.
--
Leonard Erickson ...!tektronix!reed!percival!bucket!leonard
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