First Day Of 2025 Spring. 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. When is spring begins shown on a calendar.
The first day of spring 2025 will be march 20 or 21. When do the four seasons start in 2025โfor spring, summer, fall, and winter?