Why is four season considered to be an early music program?

"Four Seasons" by Antonio Vivaldi is considered an early music program because it was composed in the early 18th century, during the Baroque period, which is characterized by its distinct musical styles and forms. The piece, written in 1723, is one of the earliest examples of programmatic music, where the music is intended to evoke specific images and emotions associated with the changing seasons. Its vibrant use of melody and instrumentation exemplifies the early Baroque style, making it a key work in the early music repertoire.