Many events were announced for celebration, bue the main, official one is at 9 PM at the 111 Minna club at, you guessed it, 111 Minna in San Francisco, California.

WordPress started in 2003 with a single bit of code to enhance the typography of everyday writing and with fewer users than you can count on your fingers and toes. Since then it has grown to be the largest self-hosted blogging tool in the world, used on hundreds of thousands of sites and seen by tens of millions of people every day.

Here’s the announcement of WordPress 0.7 on May 27, 2003:

http://wordpress.org/development/2003/05/wordpress-now-available/

This event is also available on Upcoming.org:

http://upcoming.yahoo.com/event/714298