Weekend F Service

from mta.info

179 St-bound F trains skip Ft Hamilton Pkwy, 15 St-Prospect Park, and 4 Av
Weekend, 12:01 AM Sat to 5 AM Mon, Dec 20 - 22

For service from these stations, take a Coney Island-bound F to 7 Av or Church Av and transfer to a 179 St-bound F.

For service to these stations take the F to 7 Av or Smith-9 Sts and transfer to a Coney Island-bound F.

This seems to happen a lot.