I've tried all kinds of combinations between my MacBook Pro iCal and my iPhone and it just doesn't work.
First, with iCal on my laptop, turning time zone support on gives the option of selecting which time zone to display and set events on the calendar. With support off, the calendar updates times depending on which time zone you're in. This makes no sense!!! If anything, the calendar times should stay fixed and not change at all if support is off. Turning support on should make the calendar adjust times.
Second, what's the point for entering times in different time zones anyway? If I have a meeting or a flight anywhere in the world, the time is the time no matter what. If I have travel to a different time zone and I set an event for 2 PM, that event will change time when I go to another time zone giving me the wrong time. If I set the event for 2 PM in a different time zone, it will diplay the wrong time in my current time zone.
Third, there is no option to start in one time zone and end in another. I fly all the time. If I turn time zone support on and set a time for a departing flight at 4 PM Eastern, there is no option to arrive at a time in another time zone, so the arrival time will be wrong when the calendar updates in the arriving time zone. If I turn support off, and set an event to start at 4 PM and travel an hour ahead, the calendar will then say the event is at 5 PM when it updates in the new time zone, which is wrong and I'll miss that event.
If I turn my laptop calendar time zone support and iPhone TZS both on or off, times keep getting screwed up. If one is on and one is off, it gets screwed up. Just as an example, to keep my laptop calendar to have the actual time of all my events no matter where I am, I turned time zone support on and set to Central time, where I live. With TZS off, all my times would change to one hour ahead when I go to the Eastern time zone which would screw up any event I would need to refer to. My iPhone has TZS on as well. I have a flight at 3:30 eastern arriving home at 4:30 central, but if I create the event in eastern at 3:30 there is no option to finish in central, so I would have to mark my arrival as 5:30 eastern. When I get home, my calendar would say I left at 2:30 and arrived at 4:30. If I had looked at my calendar before my trip to the eastern time zone, my calendar would say I'm leaving at 2:30, which is wrong for the zone I would leave from, but the arrival time is correct.
Now, with all TZS turned on, and my calendar set to central, and a 3:30 PM Eastern flight with a 24 hour advance alert, my phone alerted me at 4:30 Eastern of my 3:30 Eastern flight because my calendar was set to Central time, not Eastern. Had I had TZS turned off and entered the flight as 3:30, it would display at 4:30 when I arrived in Eastern and my departure and arrival time would be wrong when my calendar updated once in returned to Central and, while still in the Eastern zone, every single event in my calendar would be advance by one hour to reflect the Eastern zone and would be wrong for the actual time those events were to take place in Central, or any other time zone.
If I lived in New York and I traveled to Los Angeles and had an 8 AM meeting in LA, while in NY my calendar would say I had a 11 AM meeting if TZS was on and set to Eastern and wouldn't change to 8 until I manually selected the Pacific time zone. If TZS was off, my 8 AM meeting would display as 5 AM when I arrived in LA and the calendar updated automatically.
The whole system just makes no sense at all and serves no purpose that I can see. The time is the time regardless of where I am or what time zone I'm in. I will always be where I am and the time will always be the time. Why make it change? I want to look at my calendar and have the right time no matter where I am. Apple needs to fix this thing to either add multiple time zones for a single event's start and end time and display the time zone in the calendar or they need to get rid of time zone support altogether.
If anybody knows of a way to keep the calendar on both the computer and the iPhone to actually work in a manner that doesn't change times and will alert me to the actual time of events regardless of time zones I'd love to hear it. Outside of turning off location services, which will screw up every other app, I don't see a fix. Unless Apple give the option to turn of location services for iCal on the iPhone.