Time zones and calendar apps are always a nightmare, lose-lose for developers and users.

Many who travel just want to use an online calendar like an old fashioned diary - Put a meeting at 1pm in the diary, if you intend to meet someone at one, irrespective of where you will be, as the diary come with you and it's 1pm where you are. Your flight leaves CDG at 5pm - you don't care it's really 4pm in MAN.

Some people want and need to enter stuff in local times and are happy to have the calendar shift with them - but it does take some getting used to. I guess it's a little like getting to use the 24hr clock all the time. Initially, it can be hard to equate 14:00 with 2pm, but with practice, it becomes easier.

I now try to enter all my diary stuff in local to the event time - as my phone shifts my diary when I move time zones.

Hourses for courses and not everyone will be happy.