National Jason Day is celebrated on April 26 to honor individuals named Jason, a name derived from the Greek word "Iásōn," meaning "healer." The name has historical roots in Greek mythology, notably associated with Jason of the Argonauts, who embarked on a quest for the Golden Fleece. In the U.S., there are over 900,000 people named Jason, with a significant concentration in California. The day recognizes the cultural impact of various prominent figures named Jason, including actors like Jason Bateman and Jason Momoa, as well as musicians like Jason Mraz and Jason Derulo. While specific customs for celebrating National Jason Day are not detailed, it serves as an opportunity for appreciation of those bearing the name.