Ron Gordon hopes you'll notice something odd about this day. That's because today's date is one, three, oh-five -- a series of odd numbers. The first three odd numbers, in fact. Gordon teaches driver's education to high school students in Redwood City, California, but he's also a math nut. He also tried to get people to celebrate "Square Root Day" last year -- on two, two, oh-four. And he hopes people will get into the spirit of "Odd Day." He says you can celebrate by eating lunch at 1:35 p-m, call the Audubon Society, or watch "The Wizard of Oddz." "Odd Day" rolls around only once every hundred years.