Autumn 2024. The seasons calculator shows the times and dates of vernal (spring) & autumnal (fall) equinoxes and summer and winter solstices all over the world. By the meteorological calendar, the first day of autumn is always 1 september;
This sunday, the autumnal equinox is upon us, and with it, a shift to shorter days, longer nights and the astronomical start of fall in the northern hemisphere. Pacific daylight time) autumn begins astronomically in.