From 11:45 PM Friday, June 23 until 5:00 AM Monday, June 26 Brooklyn bound R and (late night) N trains will be diverted over the Manhattan Bridge between Canal Street and DeKalb Avenue. This means no service from Manhattan to Court Street or to the R/N platforms at Jay Street-Metro Tech, or to stops further into Brooklyn from those stations. With the continuing cancellation of weekend 2/3 service, see here, this means your options this weekend are the 4/5 (the 5 is being extended to serve Brooklyn during the weekends when there is no 2/3 service), A/C, F, and Manhattan bound R/N, all of which should (heavy emphasis, these days, on “should”) be running normally.
The following work week (Monday, June 26 to Friday, June 30) there are no planned cancellations, route diversions, or station skips directly affecting service at any local stations.
For planned service changes that may affect travel on other parts of the system, either during the weekend or the following week, see MTA Info or The Weekender.