Somehow my ubuntu got confused and it set the time a month ahead. apt-daily.timer got triggered and run at the false time.
Now the time is correct but as the timer ran in the future,
systemctl list-timers say apt-daily.timer will run again in a month!
I need to find a way to solve this.
I've looked at the wrong column -last- in
I should have looked at "next". As the answer, I guess it got corrected automatically. So the question was tainted. I am sorry.
I guess stopping and starting resets the timer too.