It's not arrogant to know there's a "most common" time for meals, working, and sleeping. When you're actually setting up a specific event, of course everyone w

It's not arrogant to know there's a "most common" time for meals, working, and sleeping. When you're actually setting up a specific event, of course everyone will participate ("actually, a 7am call is great for me -- I work early"), but knowing the defaults saves a lot of time.