d = datetime('2016-Jan-20 12:00:00','TimeZone','UTC')
d.TimeZone = 'America/New_York'
gets me the transformed time from the input... is there any way to get this answer in the original function call, without haveing the 2nd command? I know there is a Format option, but I cannot see how one can add a TimeZone in that. transform the input TimeZone.