In August 1979, KSFM announced it would be switching to a more "mass appeal" music the following month. On August 20, the "Sacramento Union" featured an article on the format switch. The entire air staff would be replaced. KSFM management hired radio consultant Jerry Clifton to initiate the new format. In the "Union" article, Clifton described the "Earth Radio" format as "esoteric ... similar to a Jazz station". KSFM broadcast its last full day of progressive rock on September 9, 1979. The following day, September 10, the station began a five-day stunting period during it played a full day of music by a well-known artist each day. The first day consisted of all-Led Zeppelin music, while the second day featured the Beatles. By the fifth day, the station was playing Donna Summer and the Bee Gees as featured artists. On September 14, 1979, KSFM flipped to a hybrid top 40/disco format with the branding "FM102".