Spring Equinox 2025 Northern Hemisphere Calendar

Spring Equinox 2025 Northern Hemisphere Calendar. 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. The march equinox on march 20 signals the official start of spring in the northern hemisphere and autumn in the southern hemisphere.

When is the first day of spring 2025? Higher latitudes in the northern hemisphere have equal day and night before the march equinox and after the september equinox.