The only planned service change directly affecting any local stations this weekend — late evening Friday, January 6 through early Monday morning, January 9 — is that 4 trains will not be serving Brooklyn in either direction. This means there will be no service at the 4/5 platforms at Borough Hall, as 5 trains do not serve Brooklyn on weekends. 2 and 3 trains should be running normally and, for those going to or from stations within Brooklyn, 3 trains will be serving all 4 train stops.
The following work week — late morning Monday, January 9 through early evening Friday, January 13 — there are no planned cancellations, schedule reductions, or route diversions directly affecting service at any local stations.
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.