I know that time, clocks and schedules certainly can give me stress. It is a HUGE struggle for me to be on time. I recognize that's because 99% of the time I would rather NOT be doing whatever it is, but hey! Whatever.
There are TIME-oriented people, and EVENT-oriented people. I am the latter.
I think, "I am meeting people for dinner" and not "I should be at xxxx restaurant at 7:00 p.m." It doesn't bother me if I am there at 6:50 p.m. or (more likely) 7:15 p.m.
It's really hard for me to keep track of time. In fact, I have stopped wearing a watch (I stopped wearing all jewelry, it was more about the metal and plastic and body energy but the time is a little part of it).
The conflict of styles regarding time can really cause some clashes. It doesn't really bother me, but I tell ya, those time-oriented types can really get bent out of shape!