Public Sub vev2()
Dim i As Integer, j As Integer, derligne As Integer
derligne = Range('a65536').End(xlUp).Row
For j = 1 To 4
For i = 2 To Range('a65536').End(xlUp).Row
Range('f' & derligne) = Cells(i, j)
If IsDate(Cells(i, j)) Then Range('f' & derligne) = CDate(Cells(i, j))
derligne = derligne + 1
Next i
Next j
End Sub