MacDailyNews mentions that today, March 24, 2007, is Mac OS X’s 6th birthday. They’ve posted the original press release online.
“CUPERTINO, Californiaâ€”March 21, 2001â€”AppleÂ® today announced that beginning this Saturday, March 24, customers can buy MacÂ® OS X in retail stores around the world. Mac OS X is the worldâ€™s most advanced operating system, combining the power and openness of UNIX with the legendary ease of use and broad applications base of MacintoshÂ®.
â€œMac OS X is the most important software from Apple since the original Macintosh operating system in 1984 that revolutionized the entire industry,â€ said Steve Jobs, Appleâ€™s CEO. â€œWe canâ€™t wait for Mac users around the globe to experience its stability, power and elegance.â€
Rest of press release at MacDailyNews