Spring in 2024 starts with the vernal (spring) equinox, which occurs on Tuesday, March 19, 2024, at 11:06 p.m. EDT (Wednesday, March 20, 2024, 3:06 a.m. GMT). This moment marks the official start of astronomical spring in the Northern Hemisphere when day and night are approximately equal in length. Meteorological spring, however, begins earlier, on March 1, 2024, and lasts until May 31, 2024.