This Presidents’ Day weekend (late tonight to early Tuesday morning, February 21) there will be no service at the Court Street-Borough Hall N/R station or at the N/R platforms at Jay Street-MetroTech, as N and R trains will be re-routed to the Q line in both directions between DeKalb Avenue and Canal Street. Service on the 3 train is suspended for the whole holiday weekend, but 2 trains should be running normally. For those traveling to or from Brooklyn, 2 trains will make all 3 stops between here and Franklin Avenue-Medgar Evers College, and 4 trains will make all 3 stops between Atlantic Avenue-Barclays Center and New Lots Avenue. Also on late nights R trains will not be running and Brooklyn bound N trains will be re-routed to the F line between Canal Street in Manhattan and 36th Street in Brooklyn. However, there will be Brooklyn bound service at Court Street and at the N/R platforms at Jay Street-MetroTech, as Brooklyn bound Q trains will be re-routed to the N/R line between Canal Street and DeKalb Avenue. You can transfer from a Brooklyn bound N train to a Q train, which will be stopping at the N/R platform, at Canal Street.
The following work week (early Tuesday morning, February 21 to early Friday evening, February 24) there will be no late night service at Clark Street or at the 2/3 platforms at Borough Hall, as 2 train service will be suspended and 3 trains do not serve Brooklyn late at night. There will be no late night Manhattan bound service at High Street, as Manhattan bound A and C trains will be re-routed to the F line between Jay Street-MetroTech and West 4th Street-Washington Square.
Always check MTA Info for unplanned service changes that may affect local service or service on other parts of your trip, or for planned service changes that affect stations to or from which you may be traveling.
Lincoln photo: Alexander Gardner, Public domain, via Wikimedia Commons