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He that is of Opinion Money will do every Thing, may well be suspected of doing every Thing for Money.
from Poor Richard's Almanack

Howell Street Almanac

Moon Phase Calculation
from US Naval Observatory


Moon Phase Calculation
by Sky & Telescope

Month: Day: Year:

Moon phase calculation algorithm by Roger W. Sinnott,
Sky & Telescope.
Calculations are based on UTC, not local time.


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