//say $iif(- isin $duration($timezone,1) || ($timezone == 0),GMT + $+ $duration($remove($calc($timezone + $daylight),-,secs),2),GMT - $+ $duration($timezone,2))
This code includes daylight saving changes. So at the moment, the UK $timezone is GMT +1hr, making EST -6hrs and not the usual -5hrs when GMT is in effect.
Does this seem correct? L