When Is The First Day Of Spring 2024. The first day of spring is march 20, 2024, at 5:02 a.m. In the northern hemisphere, the astronomical start of spring is also known as the spring equinox.

First day of spring in 2024 is on tuesday, the 19th of march (19/3/2024). The spring equinox is tuesday, march 19 and brings the first day of astronomical spring to the northern hemisphere.