Hundreds of thousands of revelers welcomed the new year in New York City’s Times Square, despite the rain, slushy streets and heightened security, capping worldwide celebrations that often emphasized the hopes for a more peaceful tomorrow.

The poor weather and tight security could not dampen the otherwise festive mood in midtown Manhattan, where the cast of the Broadway show “Hair” was among the acts to perform. People wearing oversized 2010 glasses rushed to grab hats proclaiming “Happy New Year” that were tossed into the crowd. But the mood of the times was perhaps best embodied by the famous ball that dropped at midnight in Times Square - which was “more energy efficient than ever before,” organizers boasted, with its 32,256 Philips Luxeon Rebel LEDs and covered in 2,688 Waterford crystals.

The celebration followed spirited festivities elsewhere. In Rio De Janeiro, Brazil, about 2 million people, most of them dressed in traditional white, gathered at Copacabana Beach. In Hyderabad, Pakistan, the street was dotted with little white lights, emanating from candles that peace marchers were holding. In Venice, a high tide that flooded low-lying parts of the city, including St. Mark’s Square, coincided with the midnight celebration.

Image Rana Hussein, 13, center, of Connecticut, celebrated New Year’s Eve in Times Square. Credit... Kirsten Luce for The New York Times

And in the United States, the attention naturally was focused on Times Square.

"Coming here is a dream that many people have," said Francisca Lopez, 47, a tourist from Mexico, as she waved a noisemaker in the air. She had staked out a coveted spot on Broadway between 46th and 47th streets with her teenage son and daughter. "This is the first year that we’re living it."