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Black New Moon and Great American Eclipse
Monday, August 21, 2017, 11:30 AM
is not Required
When a season has 4 New Moons, the 3rd New Moon is called a Black Moon. This is the exact counterpart to the original definition of a Blue Moon, except that Blue Moons are Full Moons. This one is unusual as it will cause a total solar eclipse nicknamed the Great American Eclipse.
Data from US Naval Observatory MICA software, corrected for Los Angeles' local time zone and daylight time when in effect.