code: def get_timestamp(timezone_name, year, month, day, hour=0, minute=0):
      
      tz = pytz.timezone(timezone_name)
      tz_datetime = tz.localize(datetime(year, month, day, hour, minute))
      timestamp = calendar.timegm(tz_datetime.utctimetuple())
      return timestamp
docs: Epoch timestamp from timezone, year, month, day, hour and minute.