From Jimmy Johnson (the Arlo and Janis cartoonist, not the football commentator, the musician, nor even the NASCAR driver, who spells his first name "J-I-M-M-I-E") comes this little tidbit. The most common birthday in the US is October 5. My birthday. Also Parminder Nagra, Kate Winslet, Grant Hill, Mario Lemieux, Patrick Roy, Michael Andretti, Bernie Mac, Bob Geldof, Barry Switzer, Vaclav Havel, Ray Kroc, and Chester Alan Arthur. Okay, some of those people aren't U.S. citizens.