First Day Of Winter 2025 Eastern Time. Winter solstice 2025 (beginning of astronomical winter) on the day of the winter (december) solstice, the sun passes through the southernmost point of the ecliptic, that is, as far as. Starts on december 21, 2025, at 4:21 am and lasts until march 20, 2026, at 5:01 am (93 days) the times correspond to the eastern time (et) time zone and will vary in different.

When do the four seasons start in 2025—for spring, summer, fall, and winter? Winter ends on thursday, march 20, 2025, once the vernal equinox (spring equinox) begins.