Subways and buses on Monday will run on a slower Saturday schedule for Presidents Day.

The switch to Saturday service means no express trains on the Nos. 6 and 7 lines; no B train; an M train that runs between Delancey-Essex streets in Manhattan and Metropolitan Avenue; Q trains between Stillwell Avenue and 57th Street-7 Avenue; and no Z train.

The MTA also has a cold weather plan in effect expected to last through the Tuesday morning rush hour, according to spokeswoman Judie Glave. On Sunday, the cold weather had northbound 2 and 3 trains running local from Chambers Street to 96th Street, the 4 and 5 trains running local from Brooklyn Bridge-City Hall to 125th Street and the Q running local between Canal Street and 57th Street-7th Avenue. Check MTA.info for weather-related service changes.

There is also planned weekend work that will disrupt service on seven lines on Presidents Day through 5 a.m. Tuesday, Feb. 17, unless noted otherwise:

1

South Ferry-bound trains run express from 14 St to Chambers Street.

5

Free shuttle buses replace service between Dyre Avenue and East 180 Street.

C

Until 11 p.m., Monday, Feb. 15, 168th Street-bound trains run express from Canal Street to 59th Street-Columbus Circle.

D

No trains between 34th Street-Herald Square and Atlantic Avenue-Barclays Center.

E

Jamaica Center-bound trains run express from Canal Street to 34th Street-Penn Station.

L

No trains between 14th Street-Union Square.

N

Trains run local between DeKalb Avenue and 59th Street.