Spring Equinox 2025 Northern Hemisphere Date. When is the first day of spring in 2025? The spring equinox, also known as the vernal equinox or march equinox, marks the beginning of spring in the northern hemisphere.

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. The spring equinox 2025 is a significant astronomical event that marks the beginning of spring in the northern hemisphere and autumn in the southern hemisphere.