1 As mentioned above, from 1927-1944, he and Doris Humphrey collaborated on a company and a school. 2  Though the technique bears her name, he also contributed to its development. 3  After their company folded, he went on to choreograph and teach on Broadway and in opera as well as modern dance.
http://www.d.umn.edu/~rkatzhar/THE%20FIRST%20FLOWERING%20OF%20MODERN%20DANCE.htm
Contemporary ballet is a genre of dance that incorporates elements of classical ballet and modern dance.
https://en.wikipedia.org/wiki/Contemporary_ballet
1 Went on to dance with the Denishawn company and also work with Ruth St. Denis on music visualization style of dances, which influenced her later work. 2  In 1927, she and Weidman (see below) left Denishawn and formed their own company which lasted until 1944, when she retired due to a hip injury and developing arthritis.
http://www.d.umn.edu/~rkatzhar/THE%20FIRST%20FLOWERING%20OF%20MODERN%20DANCE.htm
The Joffrey Ballet continued to perform numerous contemporary pieces, many choreographed by co-founder Gerald Arpino. Today there are many contemporary ballet companies and choreographers, and many traditionally classical companies also regularly perform contemporary works.
https://en.wikipedia.org/wiki/Contemporary_ballet
1 Father was a psychiatrist, planted the idea that movement never lies. 2  She began dancing in her teens; Studied and performed with Denishawn company; then toured with Ted Shawn as his partner (had wanted to work with Ruth, but Ruth wasn t interested). 3  Went on her own in 1926.
http://www.d.umn.edu/~rkatzhar/THE%20FIRST%20FLOWERING%20OF%20MODERN%20DANCE.htm
20 th CENTURY THEATRICAL DANCE, part two 1926-1950. THE FIRST FLOWERING OF MODERN DANCE. I. The Big Four – Graham, Humphrey, Weidman, Holm. 1  Martha Graham (1894-1991). 2  Father was a psychiatrist, planted the idea that movement never lies.
http://www.d.umn.edu/~rkatzhar/THE%20FIRST%20FLOWERING%20OF%20MODERN%20DANCE.htm
One dancer who trained with Balanchine and absorbed much of this neo-classical style was Mikhail Baryshnikov. Following Baryshnikov's appointment as artistic director of the American Ballet Theatre in 1980, he worked with various modern choreographers, most notably Twyla Tharp. Tharp choreographed Push Comes To Shove for ABT and Baryshnikov in 1976; in 1986 she created In The Upper Room for her own company.
https://en.wikipedia.org/wiki/Contemporary_ballet
George Balanchine is often considered to have been the first pioneer of contemporary ballet. The style of dance he developed, which lies between classical ballet and today's contemporary ballet, is known as neoclassical ballet.
https://en.wikipedia.org/wiki/Contemporary_ballet
The Nutcracker. Composed in 1891 by Tchaikovsky, this timeless classic is the most performed ballet of the modern era. It wasnt until 1944 when the first production of The Nutcracker was performed in America by the San Francisco Ballet. Since then it has become a tradition to perform during the holiday season, as it rightly should.
http://classicalmusic.about.com/od/classicalmusic101/tp/topballets.htm
1 Original style was very angular, had austere strength reflecting Graham s determination to shed Denishawn past and show seriousness of dance as art and reflect truth of human experience and the human psyche.
http://www.d.umn.edu/~rkatzhar/THE%20FIRST%20FLOWERING%20OF%20MODERN%20DANCE.htm
when was first modern ballet performed
The first Modern Ballet was performed in 1944. The  first modern ballet was performed on 1944.