Candidate, if I ask you if you are available at - specifically - "1:00 PM Pacific Time" for a phone interview, but you happen to be on the East Coast this week, then what you need to do is add three hours to 1:00 PM, which, voila! = 4:00 PM EST.
What you should NOT do is assume that if I am available at 1:00 PM Pacific Time, that I would also be available at 1:00 PM Eastern Time (10:00 AM Pacific Time). And then get mad because I didn't call you at that time, even though I made it clear when I was available.
1) I do not have you tagged with GPS and plot out your whereabouts on a Google map. I do not know where you are this week or any other week for that matter.
2) 1:00 PM Pacific Time and 1:00 PM Eastern Time ARE TWO COMPLETELY DIFFERENT TIMES. It makes no sense to assume that if I am available for one I am available for the other.