grand central madison is supposed to be fully open as of today:
Grand Central Madison finally opens for full LIRR service on Monday
By Ben Brachfeld
Posted on February 26, 2023
Full Long Island Rail Road service into Grand Central Terminal is finally set to begin on Monday, significantly increasing service capacity on the railroad and bringing a new, augmented schedule for riders.
Grand Central Madison, the brand-new 714,000-square-foot terminal situated deep underneath Manhattan’s east side, will host 296 LIRR trains per day starting Feb. 27, out of a new total of 936 LIRR trains going in-and-out of Grand Central and Penn Station.
more:
https://www.amny.com/transit/grand-central-madison-opens-full-lirr-service-monday/