The astronomical fall in 2023 started on Saturday, September 23, at 2:50 a.m. Eastern Daylight Time (EDT). This date marks the autumnal equinox in the Northern Hemisphere, when the sun is positioned directly over the Earth's equator, resulting in nearly equal day and night lengths worldwide. Meteorologically, fall started earlier on September 1, 2023, as this system divides the year into four fixed three-month seasons.
