Autumn Equinox 2024 Uk. The autumn equinox falls on sunday, september 22 in 2024. The autumnal equinox, or the first day of fall in the northern hemisphere takes place every year on september 22nd or september 23rd.

When is the autumn equinox in the uk? The autumn equinox marks the start of the season, meaning it’ll take place on september 22 this year.