UPDATE: The Greater New York photo desk has opened this project up to the public and wants to see your best photos of New York at night. Submit your after-hours snapshots to yourphotos@wsj.com, and we'll publish the best images in an online gallery. Be sure to include the time of day and location for each photo.

For more information, check out the article on the Metropolis blog.

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The Wall Street Journal sent several photographers out overnight to shoot the city during the hours when most of its citizens are sleeping. Here are photos of those awake when most of the city is not. (Previously: The Sleeping City)

Delivery man Rich Lopes carries a stack of newspapers to a vendor on Wall Street at 5:57 a.m. (Keith Bedford for The Wall Street Journal)