Why so restrictive? I can go night caching at 5pm in December, but I can "cheat" and do your cartridge in perfect daylight at 9pm in June. So you probably need to do a bit more programming involving using the month as well. Or, you could lighten up on the whole "blocking" thing, unless there's a cash reward that you need to protect.
We'll if you wanna cheat, why is there emulator en simulatorprotection in Urwigo......
I thougd i was a little creative.....
Tjappie W