Daylight in New York
At latitude 40.7° N, New York's daylight swings from about 9 hours 15 minutes at the winter solstice (December 21) to 15 hours 6 minutes at the summer solstice (June 21). Earliest sunset lands around December 7 (about 16:28 EST) and latest sunrise around January 4; in summer the latest sunset pushes past 20:30 EDT in late June.
The skyline matters
Midtown Manhattan adds its own shadow clock: street canyons run 30–60 minutes darker than the calculator's horizon-based times in the morning. For rooftop and bridge photography, use the golden-hour window from the tool — it is computed for true horizon, which is what the East River and Hudson River views actually give you.