What Is The First Day Of Summer 2024 Kalender. Winter begins with the winter solstice, monday, december 21, 2026, 3:50 p.m. Fall begins with the autumnal equinox, tuesday, september 22, 2026, 8:05 p.m.

The celestial event signifies the first day of winter, astronomically. Climate scientists often identify june 1 as the first day of the meteorological.