Official Start Of Winter 2024. In 2024, the first day of winter is saturday, december 21. In 2024, the autumnal (fall) equinox arrives on sunday, september 22, marking the official first day of fall.

This year the winter will start on thursday december 21, 2023 (day of the winter solstice) and will end on tuesday march 19, 2024 with the spring equinox. Winter solstice is the shortest day of year, longest night of the year and the official first day of winter in the northern hemisphere.