http://php.net/cal There are a few PHP-focused conferences, and a number of conferences where PHP makes a strong presence. O'Reilly Open Source Conference (with the "PHP Conference") ApacheCon (http://apachecon.com/) International PHP Conference (http://php-conference.de/) PHP-Con (http://www.php-con.com) LinuxTag (http://linuxtag.org/) Most web and open-source related conferences will have at least one PHP session