The core subject of the query, "National K9 Veterans Day," functions as a proper noun phrase. This phrase names the specific commemorative day which is observed annually on March 13th in the United States.
The significance of the March 13th date is that it marks the official founding of the United States Army K9 Corps in 1942 during World War II. The observance was created to formally recognize the service, contributions, and sacrifices of military working dogs (MWDs) and their handlers. The day honors all working canines, including those in law enforcement and other service roles, for their dedication to protecting and serving human personnel in various capacities, from patrol and detection to search and rescue operations.
Championed by Vietnam War dog handler Joe White, this commemorative day is not an official federal holiday. However, it has been recognized through legislative action in numerous states and is widely observed by military branches, veterans' groups, and animal welfare organizations to pay tribute to the loyalty and bravery of these specialized service animals.
