I was curious about this and found an old link dealing with how BlackBerry handles times:
http://forums.crackberry.com/tips-ho...e-zones-46190/ . The point is that when we make an appointment (and we are traveling to another time zone) we should enter the time zone for where the appointment is. Using BB10, if I create a new appointment, then click on the time section (where you can set the start, end, repeat schedule, etc), there is an option on the bottom called "Add Time Zone Preview". This appears to be where I can say what time zone the meeting will be in so BB will present it correctly when I'm in that time zone. Not planning to travel anytime soon, so I can't test this. But I would look into this a bit more the next time you travel.