National Chi Day is celebrated annually on May 19, with the purpose of commemorating individuals named Chi. The name Chi has Vietnamese origins, meaning "younger energy," and is associated with characteristics such as willpower, adaptability, and a desire to serve humanity. This day highlights the significance of name days, which celebrate the traits and accomplishments of name-bearers. Typical customs include sending best wishes to anyone named Chi and reflecting on their positive qualities. The name Chi is also recognized as a common surname in various Asian cultures and is often linked to both feminine and masculine connotations. Celebrating National Chi Day involves appreciating the unique attributes of those who bear the name Chi and embracing the lessons they embody.