When did jazz dance and jazz music separate?

Jazz dance and Jazz Music began to diverge in the mid-20th century, particularly during the 1950s and 1960s. As jazz music evolved into various subgenres like bebop and cool jazz, jazz dance also developed its own distinct styles, influenced by Ballet, modern dance, and other genres. This separation became more pronounced with the rise of jazz dance as a performance art, particularly in musical theater and commercial contexts, while jazz music continued to explore complex improvisation and instrumentation.