March Equinox 2024. The march equinox marks the first day of spring for anybody living in the northern hemisphere, and the first day of autumn for anybody living in the southern hemisphere. When is the first day of spring 2024?
September 22, 2024 at 5:43 am pdt : The spring equinox (march 19, 2024) signals the start of spring in the northern hemisphere, the beginning of autumn in the southern hemisphere, and a rare moment.