You could always log into the channel today (or tomorrow, or some day before friday) and ask someone to tell you their timezone and local time. Most effective would be someone in the PST time zone, as that is where Aaron is located. There are a number of channel regulars in the PST time zone, including Tevlik, Puke, Will^, Narf, myself, and others.
Daylight savings screws with timezone calculations pretty badly... Not every place in every time zone does Daylight savings, and most places start and end it at different times (different days of the year). Arizona, USA, for example, does not do daylight savings at all.
Of course, to be safe on Friday, log in an hour early.
