Looking at the gardens in Kilmer Park and the foliage on the trees I gonna guess the date to be around two weeks in the middle of April. The flower
beds don't look like they've been planted, but the trees have leaves and the grass is a lush green.
The copyright from the four layers say 2006, but I suspect they are from 2004 because of the WTC site further south.
I think I saw a picture recently and the site looked different.
(not sure though)
That's my guess.........