Maybe I'm the contrarian. I don't mind timezones at all. The thing that throws us for a loop is changing the timezone either temporarily due to some custom (Daylight Savings, Ramadan, elections, etc.) or permanently with little notice (populist tendencies in governments).

I maintain timezone infrastructure and what I'd rather see is an international treaty that all changes to country timezones require some standard period of notice. Even 90 days would be better than what we have now. Getting international politicians to care about timezones seems like a losing proposition before even starting, so I was imagining a "hack" to an existing treaty. The best one I could think of was an amendment to the International Maritime Organization (IMO). Perhaps if governments were made aware that screwing with, say, DST 3 days before it is about to go into effect would violate some treaty, they would shy away from that behavior. I know that's something the IATA could get behind.