I don't want to sound stupid, but can someone explain to me what is the NY Yorkie National?

Thanks. I know when I was in NYC in March, I took the train from Lancaster to NYC's Penn Station. Then a cab from there to our hotel. I booked the hotel, effortlessly thru Hotels.com and had no problem whatsoever checking in when we arrived at the hotel. Sounds like a fun time.
Rudys Mom (Dawn)