Tonight is Manhattanhenge, take two! If you miss it tonight, you'll have to wait until next summer. :)
If the Manhattan grid matched the geographic north-south line, then our special days would be the equinoxes, the two days on the calendar when the Sun rises due east and sets due west. But Manhattan is rotated 30 degrees east from geographic north, shifting the special days to May 28th and July 12 and 13.
Today's approximate sunset time in NYC is 8:27 pm.
More info here.
looks like a popular viewing place last night was at 42nd St & Tudor City Place -- Tudor City Place is above 42 street, so you can stand in the middle of the street!