seasons: dates of spring, summer, fall & winter
exact time and date of the september equinox and other seasons. when is the first day of autumn and when does each season start?
the first day of winter: winter solstice 2025
when is the winter solstice? in 2025, the first day of winter is saturday, december 21. so, what is the winter solstice and why does it happen? learn all about the shortest day of the year—and tell us what winter means to you!
when does winter start? your guide to the 2025 winter solstice.
astronomical winter begins sunday, dec. 21 in the northern hemisphere. here
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