What Is Summer Equinox 2025.  — in 2025, the solstice moment will fall at 20:51 utc (3:51 p.m.  — when do the four seasons start in 2025—for spring, summer, fall, and winter?

Summer and winter solstice, spring and autumn equinox dates. Here are the equinox and solstice dates—plus, answers to common questions about the seasons of the year in north.