Private Sub CommandButton1_Click()
Dim MM%, SC%, i%, SN$
MM = Month(Date + 10)
SC = Sheets.Count
Application.DisplayAlerts = False
For i = SC To 1 Step -1
SN = Sheets(i).Name
If Val(Split(SN, ".")(0)) = MM And SN <> Me.Name Then Sheets(i).Delete
Next
Application.DisplayAlerts = True
End Sub