First Day Of Spring 2025 Canada Date. Vernal / spring equinox 2025 the spring or vernal equinox marks the astronomical first day of 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.

This year, the season begins on thursday, march 20, 2025. 21, 2024, to march 20, 2025.