@malcircuit Howbout a "business local standard time" that's basically calibrated by the calculated time of astronomical sunrise at that location.
With smartphones everywhere, and cheap smart displays, this kind of thing becomes feasible. Everyone has a "BLST" clock on their phones, and businesses have a BLST-aware sign in the door showing the current BLST and how long until they open or close...
I mean, yeah, complicated, but not totally out there.
Bonus: we could maybe use this opportunity to do a decimal-based time-system, just for this purpose (and hopefully it would start bleeding into other usages, after it started being familiar in a half-generation or so).