The Winter Solstice happens on Wednesday, December 21, 2023 at 9:27 pm CST. This corresponds to Wednesday, December 22, 2023 at 03:27 UTC. This is when the sun’s zenith is at its furthest point from the equator. On the December solstice, it reaches its southernmost point. When this occurs the sun is directly over the Tropic of Capricorn in the Southern Hemisphere.