Like most (all?) desktops, elementary OS has a date & time widget. You click it and it shows calendar stuff. Mine currently looks like this:
As I said before, I spend most much of my life in terminal windows, being a sysadmin or a programmer or anything else like that.
So I’m switching from macOS to elementary OS. Why am I doing this? History time! Long ago, when I was small, I received a Commodore 64 for my 9th birthday.