First Day Of Spring Summer Fall Winter 2024. If the astronomical or calendrical seasons begin with the equinoxes (spring and fall) and solstices (summer and winter), in meteorology, they begin earlier and. While it’s the first day of astronomical spring in north america, europe and asia, summer transitions to autumn in the southern hemisphere.
Conversely, solstices mark the most drastic time. This date marks the spring equinox in the northern hemisphere.