func weekdayName(dateString: String){
       let formatterISO = DateFormatter()
       formatterISO.dateFormat = "yyyy-MM-dd hh:mm:ss"
       let formatter = DateFormatter()
       formatter.dateFormat = "EEE"
       if let dateISO = formatterISO.date(from: dateString){
           let temp = formatter.string(from: dateISO)
           print(temp)
       } else {
        print("NO Date")
    }
   }


 var temp = "2020-04-04 15:00:00"
weekdayName(dateString: temp)