Computer Security Day (CSD) is a worldwide, annual security awareness event. It started in 1988 to help raise awareness of security concerns and remind people to protect their computers. CSD is officially November 30th; however, when November 30th falls on a weekend or Holiday, it is usually observed the next business day. The theme of CSD for 2008 is "A Good Defense"
To learn more, visit the official CSD website at http://www.computersecurityday.org