First Day Of Spring 20253 2025. Check out fun facts, spring holidays, recipes, activities & more. But did you know there are actually three main definitions for the season coming from astronomy,.

The first day of spring is in 2025 on march 20 (according to the astronomical definition). In the northern hemisphere, the astronomical start of spring, also known as the spring equinox, will occur on thursday, march 20, at 5:01 am edt in 2025.