iPhone Calendar.App and TimeZones
Both iCal on Mac OS and Calendar on iOS have timezone support where you can tell it what timezone to use to show your calendar.  It didn't seem clear which you were asking about, so here's how to enable and use it on both.

On iCal on Mac OS, it is located at:

"iCal" menu -&gt; "Preferences..." -&gt; "Advanced" tab -&gt; "Turn on timezone support"


Once enabled there, your iCal window will have a menu on the right top that allows you to select the timezone to use.



On Calendar on iOS, it is in the system preferences at:

"Mail, Contacts, Calendars" -&gt; "Time Zone Support" all the way at the bottom


You can turn it on there and select the timezone in the selection below the toggle.