function datum(){
 var ss = SpreadsheetApp.getActiveSpreadsheet();
      var sheet = ss.getSheetByName('Master');
      var getDatum = sheet.getRange("C4").getValue();
      var date = new Date(getDatum); // MM/DD/YYYY
      date.setDate(date.getDate()+1);
      var dateStr = date.getDay()+'/'+(date.getMonth()+1)+'/'+date.getFullYear();
      var setDatum = sheet.getRange("W3");
      setDatum.clear();
      setDatum.setValue(dateStr);
}