First Day Of Spring 2025 Usa 2025. Updated 1:52 pm pdt, march 19, 2025.  — the vernal equinox marks the start of the spring season for the northern hemisphere.

In the northern hemisphere, the first day of spring will be on march 19, 2025. Everything you need to know about the spring equinox 2025, including when it is, what it is and how it affects our planet.