Stick Out Your Tongue Day is celebrated annually on July 19, encouraging playful expression through the act of sticking out one's tongue. This gesture can convey rebellion or humor and is often used in various cultural contexts, such as a form of defiance in Maori warrior culture or as a traditional greeting in Tibetan culture. While adults may not frequently engage in this behavior, the day invites people to embrace their inner child and partake in lighthearted antics. Common customs include sticking out one's tongue at friends and family, taking silly photos, and sharing them on social media. Additionally, the day serves as a reminder to practice good oral hygiene, as the tongue can harbor germs. Participants are also encouraged to learn fun facts about the tongue, such as its composition of eight muscles and its varying lengths.