When Are The Equinoxes And Solstices 2024. 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 times of the solstices mark the beginning of summer and winter.
America the exact moment of the summer solstice in 2024 is 20 june, at 22:50:20. An equinox is one of two days in the year when the sun crosses the equator and day and night become equal in length.