In a Wimpy Day is a fan made Friday Night Funkin mod that reimagines Diary of a Wimpy Kid, the book series by Jeff Kinney, as a rhythm battle. The Wimpy track, credited to Cótiles in the audio file, appears across the mod in parts, with Part 5 circulating as a standalone clip online. Friday Night Funkin grew through its open modding community, and crossover mods like this spread on video and soundboard sites because they pair a familiar childhood series with catchy, chart driven songs players want to replay and share.