The time & date are tiny. The only workaround I know of is the Tweak's font scaling factor. But that doesn't work because the date is SO tiny, that making the date legible causes all the other windows become too huge.
There's no adjustment for the date font, so compromise in regard to SIZE is needed to make the time & date visible to all... The same probably applies to the System Menu next to it (where the network & audio icons are).
I was using that "Showtime" Gnome extension, but this had two advantages: it wasn't an unneccesary waste of resources, but more importantly, I can see the time and date while I'm working. (With that gnome extension, the time/date information isn't on the taskbar, but on hidden on the desktop underneath whatever active window one might be working on). So I uninstalled the showtime extension and used the existing clock with the adjusted CSS.
Of course it would not work in XFCE, as it does not use or access gnome-shell.css. What I said was, creating a gnome-shell.css in ~/.config/gtk-3.0/ would not work on Zorin OS and I do not know why, since it does work in Ubuntu. Several of us have tried.
Ow im sorry I meant by u said it wouldn't work in Gnome. I think in XFCE there is a setting for the clock. Sorry for asking dumb questions, I don't use XFCE so I didn't know.