whens spring

Spring 2026 (in the Northern Hemisphere) starts on Friday, March 20, 2026, with the spring (vernal) equinox.

A couple of quick ways people talk about “when spring is”:

• Astronomical spring: From the equinox on March 20, 2026, through about June 21, 2026.

• Meteorological spring: March, April, and May (so it “starts” March 1 by this convention).

If you’re in the UK or most of Europe, that same equinox date—20 March 2026—is also what’s used as the start of spring astronomically.