The Debian Community celebrates it’s birthday, Debian Day, on this day each year. (It has also been called Debian Appreciation Day.)
Debian is one of the most popular Linux distributions, and many other distributions have been created from the Debian codebase, including Ubuntu and Knoppix. As of 2016, DistroWatch lists 126 active Debian derivatives. The Debian project provides its derivatives with guidelines for best practices and encourages derivatives to merge their work back into Debian.