From December 15 to 22, 1950, the weekday rush trains from Pelham Bay Park were extended to South Ferry. On June 23, 1956, Saturday morning express service began operating local on the 6 train. Starting April 8, 1960, late night and weekday evening trains were extended to South Ferry, followed by weekend evening service starting October 17, 1965; however, all trains were again cut back to Brooklyn Bridge by May 23, 1976, when the inner loop platform of South Ferry closed.
Answer this question, making sure that the answer is supposed by the text: does the 6 train run express on weekends?
yes