As a follow up to the last question, why does the moon appear in the daytime sky on a rare occasion and not all the time?

sportsherald

"Because of the Earth's rotation, the moon is above the horizon roughly 12 hours out of every 24. Since those 12 hours almost never coincide with the roughly 12 hours of daylight in every 24 hours, the possible window for observing the moon in daylight averages about 6 hours a day. The moon is visible in daylight nearly every day, the exceptions being close to new moon, when the moon is too close to the sun to be visible, and close to full moon when it is only visible at night. The best times in the month to see the moon in daylight are close to first and last quarter, when the moon is 90 degrees away from the sun in the sky." -from http://www.space.com/7267-moon-daylight.html May 05 12, 12:23 AM