First Day And Time Of Spring 2025. In 2025, the official first day of spring is tuesday, march 19. Spring in the northern hemisphere begins on march 20, 2025, at 09:02 gmt (05:02 a.m.

Spring will last from march 19 until june 20, when summer officially starts in 2025. The vernal equinox arrives at 11:06 p.m.