code: def _getFromTime(self, atDate=None):
          
          if atDate is None:
              atDate = timezone.localdate(timezone=self.tz)
          return getLocalTime(atDate, self.time_from, self.tz)
docs: What was the time of this event?  Due to time zones that depends what
          day we are talking about.  If no day is given, assume today.