Autumn Equinox 2024 Uk. Top 3 things to see in the night sky in september 2024: The autumn equinox marks the start of the season, meaning it’ll take place on september 22 this year.

On this day, days and nights are approximately ( but not exactly ) equal in length for everyone. The two equinoxes happen on 20 march (spring equinox) and 22 september (autumn equinox) and the days and nights should roughly be the same length.