Equinox 2024 Dates. In 2024, the official first day of spring is tuesday, march 19. Edt (12:44 utc), according to the national weather service.

Normally, the autumn equinox falls between 22 and 24 september, and this year the equinox occurs on 22 september at 13:44 bst. The equinoxes occur around march 20 and september 22 each year, corresponding to an equal length of day and.