Sometimes when doing stuff, playing games, or even relaxing doing nothing, I prefer not to know how much time has passed. It helps me stay in the zone of whatever it is I'm doing. I'm fine with having a vague sense of time with sunlight and night.
On Windows 10 I can hide the clock in the taskbar, and on GNOME I can hide the top bar (except on 44 for now).
I'm wondering if there's some concept or name or anything to describe that?