Autumn Equinox 2024 Meaning. In 2024, the autumnal (fall) equinox arrives on sunday, september 22, marking the official first day of fall. The fall equinox marks persephone’s return/descent and reflects demeter’s grief/wrath at the cyclical loss of her daughter.
Pacific daylight time) autumn begins astronomically in the northern. In 2024 the autumn equinox occurs on 22 september at 12:44 utc (13:44 bst), marking the day when we experience roughly the same amount of daytime and nighttime.