What Time Is Fall Equinox 2025. In 2025 the autumnal equinox will occur on 22 september at 18.20 gmt (19.20 bst). The first day of autumn often called fall (september equinox or autumnal equinox) is when the.

In different time zones, the date of the equinox may differ by a day, so it is important to indicate your exact location. The following are the times and dates of equinoxes and solstices from 2017 to 2030.