The fall (autumn) season for 2023 in the Northern Hemisphere officially started on Saturday, September 23, 2023. This day is marked by the autumnal equinox, when day and night are approximately equal in length. The fall season in 2023 ended on Thursday, December 21, 2023.

Meteorologically, some consider fall to start on September 1, but the astronomical start is more widely recognized as September 23 for 2023.