When Is The First Day Of Spring 2025 Canada Calendar. Spring 2025 starts on thursday, march 20th in the northern hemisphere, with daylight time lengthening and the leaves begining show on the trees with the changing tilt of the earth's axis. On this date, the day is equal.

The first day of spring 2025 will be march 20 or 21. Vernal / spring equinox 2025 the spring or vernal equinox marks the astronomical first day of spring.