I think I might have found a way to get the 20 free games after the 12th of August. Don't bash me for saying that but there were quite a few times I have noticed that nintendo used the system internal clock and calender instead of real timed one, for example : I remember when nintendo released the Wiiware demos I missed the chance to download them and somewhy I tried to change the date back. The demos were in the Wii Shop Channel after changing the date back. same goes for Animal Crossing : City Folk's limited time dlc. I suspect nintendo uses the nintendo 3ds's internal calender for checking whether you're eligable to download the free game or not. and maybe for downloading the games too (although they might have pushed their availability date to september because they haven't emulated them yet).