Percy Jackson And The Olympians: The Lightning Thief (The Movie)

OMG! I so want to see this movie so much. If it's anything like the book with special effects it should be amazing. But the only problem is that i don't know when presidents day is. I want to say it's on the twelfth of February but i'm not sure. So if you know the answer or just happen to be looking it up then please comment and tell me. Your answer will be very much appreciated.