National Javier Day is celebrated on April 21 each year, primarily in Spanish-speaking countries such as Mexico and Spain. The day honors the name Javier, which is the Spanish version of Xavier, associated with Saint Francis de Xavier, a Navarrese Jesuit priest. The name is popular in various regions, including Latin America and Equatorial Guinea, and is linked to notable figures such as footballers Javier Mascherano and Javier Hernandez, as well as actor Javier Bardem. Typical customs for the celebration may include appreciation for those named Javier and recognition of their contributions in various fields. The name itself means "castle" or "new house," reflecting its historical significance.