I'm sure the memo from the CSAF that made blues on monday mandatory is floating around somewhere. As far as different MAJCOM's wearing versus not wearing, a lot has to do with the way the schedules work. At heavy bases, you either know you're going to fly on monday (and therefore wear a flight suit) or you're not. For the most part, we don't show up with crew rest met if we aren't scheduled to fly. At fighter bases, that isn't always the case (at least the bases I'm familiar with (friends and family)). Depending on the scheduler, fighter types could be thrown into a sortie the same day it flies.