First Day Of Spring 2024 Date. In the northern hemisphere, the astronomical start of spring is also known as the spring equinox. There are four astronomical seasons on earth, defined by the movement of the sun in the sky.
The first day of spring in the uk astronomically occurs on the vernal equinox, 20 march 2025. Spring 2024 starts on tuesday, march 19th in the northern hemisphere, with daylight time lengthening and the leaves begining show on the trees with the changing.