Spring Equinox 2025 Time Pst. I put all of them into a spreadsheet and calculated the mid and third season boundaries. This year, the season begins on thursday, march 20, 2025.
On this date, the day is equal. Spring equinox 2025 (beginning of astronomical spring) on the day of the spring (march) equinox, the sun crosses the celestial equator, moving along the ecliptic.