Private Sub CommandButton1_Click()
Dim i&, j&, x&
i = CLng(CDate(InputBox("Date de début", "Choix", Date)))
j = CLng(CDate(InputBox("Date de fin")))
Application.ScreenUpdating = False
For x = i To j
Worksheets("Modèle").Copy after:=Sheets(Worksheets.Count)
ActiveSheet.Range("A2").Value = CDate(x)
ActiveSheet.Name = Format(CDate(x), "dd-mm-yyyy")
Next x
End Sub