No, it’s not a grade for the whole system this long Presidents’ Day weekend or the week after. The only planned service disruption directly affecting local stations during the holiday weekend–from 10:30 p.m. Friday, February 17 to 5:00 a.m. Tuesday, February 21–is the diversion of F trains in both directions to the Q line between 63rd Street/Lexington Avenue and Atlantic Avenue. This means no subway service in either direction at York Street in DUMBO, and no F service in either direction at Jay Street/Metro Tech. Shuttle buses will provide service between Jay Street and York; take the A or C to Jay and catch the bus there. To get to or from the LES stops on the F–East Broadway, Delancey/Essex, or Second Avenue–there will be shuttle buses running between East Broadway and West 4th Street, making the intermediate stops. At West 4th, you can transfer from or to the A or C trains.
The following work week–Tuesday, February 22 to Friday, February 25–late nights from 11:45 p.m to 5:00 a.m.–there will be no service in either direction at Court Street or at the N/R platforms at Jay Street/Metro Tech. Use the A, 2, or 4 as options.
For service changes that may affect travel on other parts of the system, either during the weekend or the following week, see MTA Info. Especially for those traveling into or from Brooklyn, I encourage you to check the MTA site; there are many changes that could affect your trip.