The First Day Of Spring 2024. When is the spring equinox in 2024? When is the first day of spring 2024, and what is the spring equinox?
By the meteorological calendar, spring will always start on 1 march; The first day of spring (march equinox or vernal equinox) is when the sun shines directly on the celestial equator passing from south to north and the length of day.