According to the MTA:
F Coney Island-bound trains are rerouted via the M from Roosevelt Av to 47-50 Sts Late Nights, 11:45 PM to 5 AM, Tue to Fri, Jul 5 – 8
No Coney Island-bound F service at 21 St-Queensbridge, Roosevelt Island, Lexington Av/63 St and 57 St.
