From AMNY:
Weekend service on the M train in Brooklyn and Queens will be shut down until July, the MTA announced on Monday, in order for the authority to replace tracks on the elevated line.
The M will not run on weekends between Myrtle Avenue-Broadway in Bushwick to its end-of-line station at Metropolitan Avenue in Middle Village, starting at 9:45 pm on Friday, May 19, and continuing until the weekend of July 7-10.