Fall Equinox Date 2024 Canada. 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.

It also lists astronomical sunrise and sunset timings on vernal equinox day. The autumnal equinox, or the first day of fall in the northern hemisphere takes place every year on september 22nd or september 23rd.