Here’s a bit of numerology for you. Today marks 17 years, one month, and 29 days since Mac OS X 10.0 was released on March 24, 2001. That’s a strangely odd number—6,269 days—but it also happens to be the exact length of time between January 24, 1984 (the launch of the original Macintosh) and March 24, 2001.