What Day Is The Spring Equinox 2025 In America. The first day of spring (march equinox or vernal equinox) is when the sun shines directly on the. This year, the season begins on thursday, march 20, 2025.

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. For those of us in the northern hemisphere, this was marked by the arrival.