 National HIV Testing Day. And government research shows that more than a million people in the U.S. have HIV, the virus that causes AIDS. But one in seven infected people don't even know they have it. Here's a good one for you. It's National Bomb Pop Day. Remember those? The rocket popsicle? Yeah, they look like a rocket ship with blue, white, red sections. Red, white, and blue, just like the flag.