California Dreamin' was written by John and Michelle Phillips and recorded by The Mamas and the Papas, becoming a major hit in 1966 and one of the defining songs of the California folk-rock era. Its wistful lyrics about longing for warm weather while stuck in a cold winter struck a chord far beyond its original release, and it has since appeared in films, adverts and countless online edits. Today creators keep returning to it because the opening is instantly recognisable, instantly nostalgic and instantly sets a sunny, escapist mood.