The winter solstice occurs when the Earth's axis of rotation is most tilted away from the Sun.
This means it is the day when the sun is above the horizon for the shortest time in the northern hemisphere.
In the far north it has not risen above the horizon for several days.
Slow TV broadcast
At the same time, it is the day when the light slowly begins to return and it becomes brighter again.
It is celebrated at Farmer seeks wife-reindeer herder Jon Krista Jonsson's farm in Tavelsjö outside Umeå.
SVT Minoritet broadcasts directly from the celebration all evening.
- This is a slow TV broadcast primarily for the Sami audience, but the hope is that it will be able to appeal to all viewers, says producer Anna Snäll.
What should viewers not miss?
- Dancer Ola Stinnerbom tries to beat his own world record in "hand stand dancing" at approximately 8 p.m.
At 22.48 Kitok and Sara-Elvira Kuhmunen play the completely newly written song "Homesickness".
That the performance takes place at exactly 10.48pm is no coincidence.
It is exactly when the winter solstice occurs.
From that time, the northern hemisphere begins to slowly approach the sun again.
See the broadcast in the player above.