Spring 2025 Means Which Month. Spring will arrive on thursday, march 20, 2025, and last until june 21, 2024. If the astronomical or calendrical seasons begin with the equinoxes (spring and autumn) and solstices (summer and winter), in meteorology, they begin earlier and correspond to periods of three full months.

In 2025, the exact time of the start of spring is at 09:01 uct (coordinated universal time). The first day of spring is in 2025 on march 20 (according to the astronomical definition).