Autumn Equinox 2024 Uk Dates And Times. Autumn equinox 2024 occurs sunday 22 september at 12:44pm (13:44 utc), as this is when the centre of the sun crosses the celestial equator. This year autumn begins on 23 september 2023 and ends on 22 december 2023.
In the northern hemisphere, the autumnal equinox takes place on september 22, 2024, at 12:44 gmt (08:44 a.m. The autumn equinox is the moment when the sun passes the earth’s equator and for one nanosecond the earth is neither tilted toward nor away from the sun.