What Is The First Day Of Fall 2025. The earth’s fixed tilt as it orbits the sun leads to this day when the northern and southern hemispheres have. Spring begins with the vernal equinox, thursday, march 20, 2025, 5:01 a.m.

In 2024, the last day of summer in the northern hemisphere is september 22! The following table shows the dates together with the exact time in which each of the seasons of the year begin.