A picture of buildings in the New York horizon brightening their windows with crosses for Easter has actually gone through numerous cycles of viral appeal over the years and is generally posted together with a claim that such a display would not be allowed modern times:
The image is real and was taken shortly prior to Easter in 1956. One paper, the Oxnard Press-Courier, published the photo on 31 March 1956 with the following caption:
Big crosses, formed by lighted windows, blaze above New Yorks skyline as part of an Easter display screen in Manhattans financial district. This scene, photographed from the roof of the Municipal Building, includes 150-foot-high crosses in the City Services Co., City Bank Farmers Trust Co., and the Forty Wall Street Corp. buildings. (United Press Telephoto).
The Empire State Building likewise displays joyful lights throughout religious vacations (red, green and white for Christmas, pastal fades for Easter, blue and white for Chanukah) and Chicagos Daley Plaza has featured a Nativity Scene since 1984.
When it comes to the claim that this form of light display would cause an uproar today, it should be kept in mind that Oklahoma City used structure windows to illustrate crosses during the holidays as just recently as 2010:.