Astronomical winter begins at the winter solstice, which is the shortest day of the year. This means days get longer during winter—very slowly at first, but at ever-larger daily intervals as the March equinox …

The December solstice is the moment the Sun is directly above the Tropic of Capricorn in the Southern Hemisphere. This is the southernmost latitude it reaches during the year.

The December solstice (winter solstice) in Boston is at 10:03 am on Sunday, December 21, 2025. In terms of daylight, this day is 6 hours, 12 minutes shorter than the June solstice.

The December solstice (winter solstice) in Indianapolis is at 10:03 am on Sunday, December 21, 2025. In terms of daylight, this day is 5 hours, 38 minutes shorter than the June solstice.

The December solstice (winter solstice) in Hartford is at 10:03 am on Sunday, December 21, 2025. In terms of daylight, this day is 6 hours, 4 minutes shorter than the June solstice.

The December solstice (winter solstice) in Albuquerque is at 8:03 am on Sunday, December 21, 2025. In terms of daylight, this day is 4 hours, 44 minutes shorter than the June solstice.

The December solstice (winter solstice) in New York is at 10:03 am on Sunday, December 21, 2025. In terms of daylight, this day is 5 hours, 50 minutes shorter than the June solstice.

The December solstice (winter solstice) in Washington DC is at 10:03 am on Sunday, December 21, 2025. In terms of daylight, this day is 5 hours, 28 minutes shorter than the June solstice.

The December solstice (winter solstice) in Santa Clarita is at 7:03 am on Sunday, December 21, 2025. In terms of daylight, this day is 4 hours, 36 minutes shorter than the June solstice.

The December solstice (winter solstice) in Minneapolis is at 9:03 am on Sunday, December 21, 2025. In terms of daylight, this day is 6 hours, 51 minutes shorter than the June solstice.