It's a date with a life lesson number of 33.
12/11/2017 = 12+11+(2+0+1+7) = 33
They're blaming it on ISIS.
Doesn't 1515 look like ISIS?
And again, ISIS was named perfectly for a 'false flag'.
Notice the attack was on 42nd. That's perfect for a 'pipe bomb'.
12/11/2017 = 1+2+1+1+(20+17) = 42
Also important, this happened in 'Hell's Kitchen', connecting to the name of the 27-year-old attacker.