Mutt’s Day is celebrated on July 31st of each year. The staff at National Whatever Day were unable to discover the origin of Mutt’s Day.
There is a profusion of words and phrases used to describe dogs that are not designated as a purebred or pedigreed dog. The words cur, tyke, mutt, and mongrel are used, sometimes in a derogatory manner. There are also regional terms for mixed-breed dogs. In the United Kingdom mongrel is the unique technical word for a mixed-breed dog. North Americans generally prefer the term mix or mixed-breed. Mutt is also commonly used (in the U.S.A and Canada), often in an affectionate manner. Some American registries and dog clubs that accept mixed-breed dogs use the breed description All American. In the rural southern United States, a small hunting dog is known as a feist.