In China we have a single, big, timezone. It's a bless, there's no need to convert time when you are travelling. I live at northwest China, has more than two hours difference from Beijing. You only need to delay your living pattern by 2 hours, so no bonus for late sleepers.
> It's a bless, there's no need to convert time when you are travelling.
Hah, and people here are all for having timezones. "Imagine how crazy it would be to have the sun coming up at 3AM in some places and 7PM in others!" I can't be sure without trying, but I'd argue it's pretty much equally messed up with and without timezones. Right now as a computer guy, I know time zones make everything more complicated.
When traveling somewhere for business you make an appointment anyway, so you know when you have to be somewhere and can plan accordingly. For holidays you'd look up the local sunrise time (which varies pretty much everywhere on earth anyway, albeit a bit more predictably now).