Metro-North is changing the hours that the North End Access for Grand Central Terminal North End Access will be open, starting Monday.
— an announcement from Metro-North
North End Access will be available for customers on weekdays (excluding holidays) from 6:30 to 10 a.m. and 4 to 7 p.m.
Other Grand Central Terminal entrances and exits also will have earlier closing times. Signage indicating revised hours for select Grand Central Terminal entrances and exits will be posted.
Customers can continue to use the entrance at 105 E. 42nd St. and Lexington Ave. — Graybar at all times.

Eric Baetscher on Wikimedia Commons
Grand Central Terminal at Night (No, this doesn’t have anything to do with the north passage — we just like the picture.)