For y = 1900 To 2100
For m = 1 To 12
d = DateSerial(y, m + 1, 1) - 1
If Day(d) = 31 And Weekday(d) = vbSunday Then
WScript.Echo y & ", " & MonthName(m)
i = i + 1
End If
Next
WScript.Echo vbCrLf & "Total = " & i & " months"