I completely agree on changing to UTC everywhere. When I need to run to a store or the bank or post office I often need to jump on Google to see what hours they are open anyway. What difference would it make if it says a business is open 08:00-17:00 or if that shop set its hours to be 12:30-20:30 because of its longitude? None, really. You would just get used to hours of business in your area being close to these other two numbers instead of 8 am to 5 pm. No big deal. What other effects would there be? Well some people would celebrate New Year's when the sun was high in the sky while others celebrated at night. Again, no big deal.
Noon has several different definitions. A modern definition is 12:00 on the clock during daytime. Which is funny because noon comes from Old English meaning the ninth hour and used to be closer to our mid-afternoon. Another definition of noon is when the sun is highest in the sky, that is, when the sun crosses the local meridian. This one makes the most sense to me intuitively because it can be guesstimated by a person in the wilderness without the aid of watch or compass. Another definition is mid-day which is different depending on the date and your latitude. If the sun rose at your location today at 06:00 and set at 20:00 then mid-day would be 13:00.
Also consider that in our increasingly automated and electronic world it would be a trivial thing for clocks with GPS or at least communication with cell phone towers to display either UTC or, at the user's option, the delta from local sunrise. So a business could set its hours as 02:00-10:00 Delta time. And we could all set our alarm clocks by Delta time as well, so that our body clocks only have to adjust 30-60 seconds a day each day all year round, which is exactly what our forebears did over many million years of evolution. Don't fight Mother Nature! Do things her way and be happier.
Time to take stock. Go home with some office supplies.