system
A chat on subreddit /r/me_irl
human
We still use "Übermorgen" (overmorrow) and "Überübermorgen" (overovermorrow) in german.

Same with Vorgestern (beforeyesterday) and Vorvorgestern (beforebeforeyesterday)
gpt
Howdy neighbor!

Same in Denmark.

"Overmorgen" and "overovermorgen", and "forgårs" and "forforgårs".