Today, September 22 is the first day of autumn for those in the Northern Hemisphere. Night and day will be closest to equal in most locations, marking the beginning of fall, or the September equinox. The March Equinox marks the beginning of spring and usually occurs around March 21 each year. If you live in the Southern Hemisphere, today marks the first day of spring. The next full Moon, closest to the September equinox, is the Harvest Moon. For those in the Northern Hemisphere, the Harvest Moon will occur on October 1. A harvest moon is named because the Moon is exceptionally bright and large, rising early near twilight, allowing farmers additional time to harvest their crops under the Moon’s light.