The winter solstice denotes the first day of the winter season. For the Northern Hemisphere, the date of winter solstice is either on December 21 or 22 (changes yearly). June 21 or 22 is the date of t [..]

The time at which the sun is farthest south in the Southern Hemisphere, on or around December 21.

Approximately December 22 in the Northern Hemisphere when the sun is lowest in the sky and directly overhead at latitude 23.5ºS, the Tropic of Capricorn.

(December 22 in the Northern Hemisphere, June 22 in the Southern Hemisphere) longest night of the year and the beginning of winter.

The farthest point of the Sun?s latitude south of the equator (for the Northern Hemisphere), around December 22. The beginning of winter.

That point of time at which Sun obtains his maximum declination and minimum noon altitude, and appears to stand still in declination for an appreciable time. Occurs about December 21 in northern latit [..]

The time at which the sun is farthest south in the Southern Hemisphere, on or around December 21.

Approximately December 22 in the Northern Hemisphere when the sun is lowest in the sky and directly overhead at latitude 12 1/2° S, the Tropic of Capricorn.

The shortest day, when the overhead midday sun is furthest from the equator in the opposite hemisphere.

The time at which the sun is farthest south in the Southern Hemisphere, on or around December 21.