National Sofia Day is celebrated annually on May 30 around the world, particularly honoring those named Sofia, a name of Greek origin meaning "wisdom." The name has various forms, including Sophia, Sophie, and Sofi, and has gained popularity due to its historical significance among European nobility and the Christian faith. The celebration is especially meaningful for parents and guardians of girls named Sofia, as the name is linked to Saint Sophia, a revered Christian martyr. Customs associated with the day may include appreciation for those named Sofia, reflecting on the name's rich history, and acknowledging its continued popularity in modern society. The name has maintained its relevance across various cultures and remains a common choice for newborns.