Bees adapt their hours to the urban environment. From an interview with a NYC rooftop beekeeper:
For Berkshire bees, quitting time is about 5 pm. New York City bees, they work harder and longer. And as you can see, we’re here before 7 am, and these bees are already starting to work, whereas the country bees won’t be opening the doors till about 9 am. And these city bees will still be hard at work at 7 tonight! Maybe it’s because it’s warmer here or maybe it’s the city lights. Whatever it is, they definitely work longer hours.