Now when you open Sketch.app everything should appear as trial has not expired yet. So command above will set your Date & Time to Sun Jan 2 03:04:00 +07 2005. To set specific date you it with date parameter in following format +%m%d%H%M%y (MonthDayHourMinuteYear). And you can do it from your terminal too! All you need is date command. But this can be really annoying do it over and over.
