function onEdit(e) {
    var sheet = e.source.getActiveSheet();
    var idCol = e.range.getColumn();
    var idRow = e.range.getRow();
    var date = new Date();
    var date = Utilities.formatDate(date, 'Europe/Kiev', 'dd-MM-yyyy\' \'HH:mm:ss\' \'');
    if ( idCol == 5 ) {     
    sheet.getRange(idRow, idCol - 1).setValue(date.toString());
    }
};

If Not Intersect(cell, Range("F2:F500")) Is Nothing Then
          
  If IsEmpty(Target) Then
    cell.Offset(0, -1) = Empty
  Else
    With cell.Offset(0, -1) 
      .Value = Now
      .EntireColumn.AutoFit
    End With
  End If