Autumn Equinox 2025 Uk Time And Date. 2025 dates and times in the northern and southern hemispheres. According to the meteorological calendar, the first autumn day is sunday 1st september 2025.
In different time zones, the date of the equinox may differ by a day, so it is important to indicate your exact location. The 2025 fall equinox—also called the autumn equinox—takes place on sunday, september 22, 2025.