Christmas decorations in New York City typically stay up until after New Year's Day, which is January 1st. However, some decorations may remain on display for longer, depending on the location and the event. For example, the iconic tree at Rockefeller Center is kept lit until early January, and the New York City subway stations often display seasonal decorations for an extended period. Some stores and businesses may also keep their decorations up for longer, depending on their individual preferences and marketing strategies.