I have seen many articles about time zone math but what I am doing is either the wrong AM or PM (like it is 25 hours and PM when I'd like 1 AM). Basically I do not mind manually changing the formula (as when Daylight Saving changes) and even if the hour is off by one (as in my target may or may not have have changed) it is close enough. If I know someone is ahead by X hours or behind by Y, one hour plus or minus is close enough. Sure, accuracy would be great, but if I my customer was ahead/behind by X, what formula would I use to calculate the current time of the customer? I am Eastern, and Daylight Saving is off. Ideas?