Thnaks to all of you, I called the agency to change the flight, and I'll land in JFK on Friday evening.

This means I'll have a short day in NYC, so I guess Central Park AND the MOMA will be in my planning (Central park in the morning, until the MOMA opens, then I'll have till 15:30/16:00 before leaving for Newark.

Is it a good idea to take a train to Manhattan late in the evening (after 11PM in my case), or should I rather use a cab ?