September 20, 2021
Full moon for September occurs today at 6:55 pm. You can find the Moon rising in the east as the Sun sets in the west. September’s full moon is the nearest to the autumnal equinox, which means it is the Harvest Moon for 2021. Harvest Moons are the full moon nearest the autumnal equinox. It can occur anywhere from two weeks before or after the equinox.
Full moon on September 20, 2021, is the fourth full moon of this summer. Image credit: NASA, SVS, Ernie Wright.