National Devin Day is celebrated on May 5 as a day of appreciation for individuals named Devin around the world. The name Devin has various origins, including Gaelic, Celtic, and Old French, with meanings such as ‘fawn,’ ‘gift,’ ‘fearless,’ and ‘perfect.’ The day was established in honor of Devin Townsend, a prominent Canadian musician known for founding the extreme metal band Strapping Young Lad. While the name Devin was popular as a masculine name in the United States, it peaked in usage during the late 20th century, with variant forms including Devyn and Devan. Celebrations typically involve recognizing and honoring those named Devin, although specific customs are not detailed in the source.