Clearly the best day to invade the USA is the 4th of July. With all the fireworks going off no one would notice until it was too late.

The best time to invade Ireland would be Halloween. Bonfires are lit and fireworks are set off, in spite of both being illegal.

With all the noise of fireworks and the smoke and flame from the fires. It's like a first class battle going on. On the other hand with a tiny army and no air defence any day will do.

Happy fourth to all you Americans!