Agreed with all the comments!
Hars to plan internationally without the possibility for planning in different timezones.

Agree - This feature is definitely needed for business travelers.

The facility of having a dual time zone graphical interface ( showing one column for "Active time-scale", on left, as currently available and an additional time axis for home time, or another auxiliary time-zone, on the right) would greatly enhance the functionality and user friendliness of your software -- sort of similar to the graphic implementation on MS outlook for example !

I agree - and this is the bare minimum. Ideally all times should be input as you would do in a paper diary, with the times never changing.

For a calendar to be called 'Business' this is a very basic must have feature.
Users of business calendars are likely to demand the ability to set travel schedules that start/end in different time zones.
I hope this request gets its priority escalated and resolved.

Mandatory for all frequent travellers. Even google calendar has this feature

It would be a perfect tool for me.

As this is 'Business' calendar, it should also cater for those travelling on business. Much easier to diary your itinerary before you leave but you don't want it altered after you arrive just because you have changed time zones.

This would be a perfect tool for me!

Could be interesting the option to finish events in another time zone than the one at the start of the event. So it gets quite confusing if I schedule something on certain time zone as I need to recalculate myself the time it finished based on thetime difference between the 2 palces.

I have found this shortcoming in several Android calendars. Google Android calendar doesn't do it even though you can do it on desktop computer. I think this is important for people traveling a lot across time zones. Obviously you can pdf your itinerary and check it there but then what is calendar for?

The left most column displays hours. It would be great if there could be multiple columns that correspond to different timezone (the left most being the current system timezone). One additional (like outlook) would be nice, but for us that travel across multiple zones, having 3 would be even better

Please consider upgrading time zone feature with the possibility to
choose different times zones for start and end time of event like this is implemented in google. (Can be used for flight schedules for example when countries are mostly in different time zones). Time zone by default should be chosen from the one set in settings. Like in google you can set your time zone, but still can choose any time zone for event or even different time zones.