Saturday Night was a major 1970s pop hit for Scottish band Bay City Rollers, whose catchy chant and upbeat sound made them teen idols of the era. The song later became a staple of retro playlists, party compilations and nostalgic film and television soundtracks, keeping its opening instantly recognisable decades later. Online, short clips of its beginning are reused in edits and memes because the first few seconds signal fun, dancing and a weekend mood without needing any lyrics or context.