December 21 2024 - A solstice is an event in which the earth’s poles are most extremely inclined toward or away from the sun, at about 23.5 degrees. Solstices happen twice a year, June and December, marking the change of seasons to summer and winter. During the December solstice, the sun is directly over the Tropic of Capricorn at noon and it marks the Northern Hemisphere's astronomical beginning of winter with the shortest period of daylight. In the Southern Hemisphere, it marks the beginning of astronomical summer with the day having the longest period of daylight of the year. More