December 1, 2007
Ubuntu 8.04 (Hardy Heron) alpha 1 officially released
The Ubuntu development community has officially announced the release of Ubuntu 8.04 alpha 1. Ubuntu 8.04 (codenamed Hardy Heron) is the next major version of the popular Linux distribution. The final release of Ubuntu 8.04, which is scheduled for April 2008, will be supported on the desktop for three years and on the server for five years.
Link: ars technica