Autumn Equinox 2025 South African Calendar. Spring equinox 20 march, summer solstice 20 june, autumn equinox 22 september, winter solstice 21 december. The 2025 fall equinox—also called the autumn equinox—takes place on sunday, september 22, 2025.
Falling on september 22, 2025, this equinox marks the official start of fall in the northern hemisphere. This page contains a national calendar of all 2025 public holidays.