Boyhood by Birth Day is a slowcore, lo-fi bedroom indie album by the ambiguous artist Birth Day, who also releases music under the moniker sign crushes motorist. Birth Day is 18-year old Liam, who lives in Belfast. Boyhood was released in 2022 and was the first and only release under this moniker. The album is renowned in the online slowcore world, with almost all songs reaching over 1M streams on Spotify, the largest reaching over 12M.