Happy First Day of Winter, December 21, 2024. It occurred at 4:21 am EST when the sun is at its most southern position of the year, directly over the Tropic of Capricorn. It is always on December 21st or 22nd.
It's common to hear it called the shortest day of the year. It's not. Whatever the season, all days are 24 hours long.
The Winter Solstice is the day that has the least amount of daylight and the longest amount of darkness or night.
Starting the next day, the amount of daylight increases by 1 minute. "It doesn't sound like much, but after just two months, or around 60 days, we'll be seeing about an hour more of sunlight." (CBS News, December 21, 2024, 9:19 am EST