When Is 1st Day Of Spring 2025 In The Us. Spring 2025 starts on thursday, march 20th in the northern hemisphere, with daylight time lengthening and the leaves begining show on the trees with the changing tilt of the earth's. In 2025, the exact time of the start of spring is at 09:01 uct.

Shortest day spring (2025 year) 22 december (10 hours 12 mins 8 sec) In 2025, the exact time of the start of spring is at 09:01 uct.