National Billy Day is celebrated annually on February 25 to honor individuals named Billy, a forename primarily given to boys with English origins, meaning ‘resolute protector.’ The day recognizes the lives, personalities, and achievements of people named Billy, who are often characterized by their stable and balanced personalities, as well as their willingness to help others through civic engagement. The name has a significant history in the U.S., with notable figures such as musician Billy Joel and outlaw Billy the Kid. While the text does not specify particular customs or activities associated with the celebration, it emphasizes appreciation for those named Billy across the globe.