National Christina Day is celebrated on May 9 each year, honoring individuals named Christina. The name 'Christina' has Greek origins meaning 'Christian' and has various variants, including Christiana, Cristina, and Christine. In the United States, it ranks as the 131st most popular given name, with California having the highest number of people named Christina. The name is predominantly female and is most commonly used as a first name. While the trend of naming babies 'Christina' is declining, it remains a significant name in many cultures, particularly in Sweden and Spain. On this day, people often celebrate by appreciating those named Christina, and activities may include reaching out to friends or family members with that name.