Sunlight on Earth, on the day of the winter solstice.
The north polar region of Earth is in 24-hour darkness,
while the south polar region is in 24-hour daylight.
Gif via Wikimedia Commons. (From Earthsky.)
The Winter Solstice is here. The important thing to know is that at 23:03 UTC (3:03 PM PST, 4:03 PM MST, 5:03 PM CST, 6:03 PM EST) the dark retreats, and light begins its welcome return.