I'm assuming its to be published in the next edition of the NYT, which would be the 20th.
A quick check of the stories on the front page suggests this is the case; editorial content and news covering yesterday's events is all /19 (today) whereas today's news and online content (for tomorrow's paper) is all /20 (tomorrow).
It's showing correct (Feb 19th) for me.
In the URL
Ah ok, I think the OP edited his post to URL from 'link' which I assumed to mean linked articled.
It may be dated based on the expected print publication date.