- it's the shortest day of the year. For us in Minnesota, we'll have 8 hours and 46 minutes of daylight.
- the sun is at lowest point it'll reach in the sky at "noon".
- the sun rises and sets the farthest to the south.
Of course this is a relative description of what is happening, the earth is the one doing the moving compared to the sun; all these changes are due to the tilt of the earth, and the change of this tilt relative to the sun as it travels around the sun.
I hope you enjoy the solstice!
(note: no attempts at historical accuracy were made in the above depictions of holidays associated with the solstice)