Sun / North position wrong?

[Hatsize7]

Please someone tell me what I'm doing wrong here, it drives me nuts.
I'm trying to do a sun study for a project, and I noticed that the sun position changes horizontally when I change the date.
I mean, at exactly noon the sun should shine from the south. On the first image I set up a stick so the sun is at the top, during summer solstice.
Now if I change the date, but keep the hour at 12:00PM, I expect the sun to be in the same position, just lower in the horizon (so it should be behind the stick).
That's not what happens. Isn't it how it should behave? It's way over to the right when it's December.
What's going on here?
Thanks!

[SSmolak]

This is Sun expression issue. I reported it to Maxon. This is strange bug.

Here you have Octane Daylight with locked horizontal Sun rotation while using Sun Expression Tag. You can rotate Sun by using Horizontal Sun Rotation slider :

[SSmolak]

Also look on this : https://en.wikipedia.org/wiki/Analemma

[Hatsize7]

Holy Moly!
Thank you SSmolak!

Also, I found this: https://en.wikipedia.org/wiki/Axial_precession
In case someone is doing ancient pyramid photos with accurate sun/sky positions