Help us choose the greatest day in the history of New York City! Does James Brown's debut at the Apollo trump the opening of the Brooklyn Bridge? Or the glorious moment when riders first felt the cool breeze of air conditioning in the subway? Take our poll below, and choose one historical moment from our list. We'll publish the results in a forthcoming issue of the magazine. And for outside-of-the-box thinkers who have their own dates in mind, please take to the comments section and tell us about a single day you think was the city's best. Provide a date (if you can) and a brief argument in favor of your choice.