[onwchristian]

If you move to one time zone, dates get complicated as well. You may have meetings scheduled on separate dates but in the same business day. Birthdays: they're now the afternoon of one day and the morning of the next.

Furthermore, while travelers may not have to change their wristwatch to account for the local time, they still would have to grasp "what time the locals do X." This may be more difficult for people to reason about if they can't easily draw on their expected scheduling from "back home." Simply knowing that 8:00 to 5:00 is a common work-day will no longer be easily translated, as it may be 11:00-20:00 one place and 05:00-14:00 somewhere else.

In any case, people are creatures of habit, so they tend to fight change. So I don't foresee this ever happening, regardless of whether it would solve some problems (and debatably it may cause as many problems as it solves).

[jtheory]

> Furthermore, while travelers may not have to change their wristwatch to account for the local time, they still would have to grasp "what time the locals do X."

Good point -- everyone is welcome to switch to this system now, when traveling. Just don't reset your watch.

You'll just need to learn the new time to set your alarm in the morning, the new time to say "whoa, we'd better get lunch before restaurants close", the new time to think about getting the kids to bed....

It's so much easier to just reset your watch (or like most people I know, just double-check your phone has auto-updated to the new time zone), and keep your reference points.