I guess the idea is you'd have to know "Our Denver office hours are between H and W, and they have lunch at hour P.", so you don't schedule meetings at P:00. B

I guess the idea is you'd have to know "Our Denver office hours are between H and W, and they have lunch at hour P.", so you don't schedule meetings at P:00. But well, I don't think it really works. Add another timezone to the mix and you're going to get a jumble of letters you won't remember, you'll have to write it down, and at that point you might as well use a diagram like this: https://everytimezone.com https://everytimezone.com (which I think can also be made analog, just add a few lines for "Lunchtime in London", "Lunchtime in Denver", etc.