Having work start at 5 am doesn't make time unofficial, does it? It would seem like it would make starting work at 8 am non-standard, but I don't see any logis

Having work start at 5 am doesn't make time unofficial, does it? It would seem like it would make starting work at 8 am non-standard, but I don't see any logistical or biological reason that people have to go to work when a clock says "8:00". In fact breaking from the "8:00 means go to work" custom seems like less of a strain on transit systems (among other things). Or are you saying that "start work at 8:00" is so ingrained that people create another unofficial time zone to deal with it?