Spring Equinox 2024 Date And Time. 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 of equal night across the. An equinox is one of two days in the year when the sun crosses the equator and day and night become equal in length.

America the exact moment of the autumnal equinox in 2024. Australia equinox and solstice dates.