Autumn Equinox 2024 Uk Time. This sunday, the autumnal equinox is upon us, and with it, a shift to shorter days, longer nights and the astronomical start of fall in the northern. According to the astronomical autumn, the autumn equinox will signal the start of the season which starts on the 22nd of september 2024.

Pacific daylight time) autumn begins astronomically in. In 2024, the autumnal (fall) equinox arrives on sunday, september 22, marking the official first day of fall.