National Tattoo Day is observed worldwide every July 17 to recognize the history and cultural significance of tattoos and to celebrate the talented tattoo artists across the nation. The holiday has been around since at least 2016, although its origins are unclear. Tattoos, a form of body modification involving the insertion of ink into the dermis, have been practiced for millennia across various cultures, serving purposes such as marks of rank, rites of passage, and spiritual symbols. In modern times, individuals may choose to get tattooed for artistic, memorial, or functional reasons, among others. Celebrations often include sharing photos of tattoos and their stories on social media using the hashtag #NationalTattooDay, and it is also a popular day for those considering a tattoo to finalize their designs or book appointments with artists.