WASHINGTON, Dec. 21 (UPI) -- At 6:04 p.m. EST on Sunday, the sun will be appear directly overhead along the Tropic of Capricorn, at 23.5 degrees latitude, south of the Equator.
It's the winter solstice, marking the beginning of winter and the longest day of the year in the Southern Hemisphere and the shortest day of the year in the Northern Hemisphere. Naturally, being the shortest day of the year, Sunday night will be the longest night of the year for the top half of planet Earth.