Quote:
Originally Posted by Polydamas
Yes, of course the moon is often visible in the afternoon, but that seems like it might be even more excessive book-keeping than tracking phases of the moon in a solar calendar.
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In fact it's the same exercise as tracking the phases of the moon. The phase of the moon is directly correlated with how much of the day it is up - i.e. when it's close to the sun in the sky, it's new and up during the entire day, when it's directly opposite, it's full and not up during the day at all...