At the end of this video is the announcement of the dates for the $29 ticket nights: January 23, February 7 and February 23. Tickets go on sale on Monday, January 6 at Noon. On another NYC Ballet topic, the program for January 23 is listed as Kammermusik No. 2, After the Rain Pas de Deux, Concerto Barocco, The Infernal Machine, and Rubies. Programs for the other two dates are not on the web site yet.
P.S. The video is about JR, the artist whose work will be on display at the theater during the winter season.