While traveling, does will zoho calendar events synced with ical on iphone adjust to the time zone my phone is in?

For example:  Our offices in the east coast in America.  We will be on the west coast for one week only.  Do we set the appointments for that week using east coast time (EST) or west coast time (PST)?  

If we set for PST now, they show up 3 hours later on our calendar NOW, but will it adjust when we land on the West coast?  If the calendar does not adjust, we should/will keep setting the meetings with the East Coast?

Thanks!