On this day in 2019 – December 22nd – at 04:19 UTC the December solstice occurred, the start of winter in the northern hemisphere and summer in the southern hemisphere.

UTC=Greenwich Mean Time, so for most of North America and the Pacific islands the solstice was on December 21st. The northern winter solstice happens when the Sun is directly above the Tropic of Capricorn.

Mona Evans
For news, activities, pictures and more, sign up to the Astronomy Newsletter!