How to make script stop after a given date

[Skitty 45]

I was searching the forum for an example and never found anything... I guess it might be due to how easy it is.. But any way, some one else starting-off might need an example!

If @YEAR & @YDAY < "2012" & "346" Then
    MsgBox(16,"Mayan Calendar","The world has not yet ended.")
Else
    MsgBox(16,"Mayan Calendar","The world has ended.")
EndIf