system
A chat on subreddit /r/me_irl
human
Sure you can do this in English too!

"I will speak to you on the morrow, and if not then then the morrowmorrow!"

"If you do, I will remind you that yesteryesterday you promised to pay me back!"
gpt
It would be adding more overs to overmorrow (and I forget the past version).  The English day after/before the next/previous day is built on German syntax.