Fall in 2023 began astronomically on Saturday, September 23, 2023, at 2:50 a.m. Eastern Daylight Time (EDT). This event, known as the autumnal equinox, marks the moment when the sun shines directly on the Earth's equator, leading to roughly equal day and night lengths globally. Meteorologically, fall in 2023 started earlier, on September 1, following a fixed calendar system used for weather statistics and forecasting. In summary:
- Astronomical fall began September 23, 2023, at 2:50 a.m. EDT.
- Meteorological fall started September 1, 2023.
This equinox transition signals the gradual shift to cooler temperatures and changing daylight typical of fall.
