Rhythmic oldies is a radio format that concentrates on the rhythmic, R&B, disco, or dance genres of music. Playlists can span from the 1960s through the 2000s and, depending on market conditions, may be designed for African-American or Hispanic audiences. It is also referred to as "Jammin' Oldies" or "Music From Back in the Day" by various radio stations. Since the late 2000s, much of the library in the "rhythmic oldies" format has been adopted by the classic hits format. A variation on the format is urban oldies.