Winter begins Friday Morning
The official beginning of winter across the northern hemisphere will occur this Friday morning, December 21st at 4:11 A.M. Mountain Standard Time. This is known as the winter solstice and it marks the moment when the Sun’s overhead position reaches its maximum southerly latitude, over the imaginary line known as the Tropic of Capricorn. It also signals the shortest “day” of the year for the northern hemisphere, day being defined as the amount of time between sunrise and sunset.
The winter season over the northern hemisphere will last for about 89 days, which is the shortest of the 4 seasons over the northern hemisphere. The seasons are not of equal length because the Earth does not orbit the Sun at a constant velocity, but speeds up and slows down as the year progresses.
Starting Saturday the 22nd the daytimes will begin to grow as the Sun begins its annual trek northward. Only a few seconds are gained each day initially, but that will increase as spring approaches. Spring will arrive over the northern hemisphere next March 20th at 5:01 AM MDT.Return to Latest News