In the United States, which calendar date is New Year's Eve?

In the United States, New Year's Eve is December 31.

New Year's Eve is the final day of the Gregorian calendar year. In the United States, public celebrations typically build toward midnight between December 31 and January 1, when the new calendar year begins. The date is observed with parties, countdowns, fireworks, concerts, and televised events.

The most internationally recognizable U.S. celebration is the Times Square Ball drop in New York City, but cities and communities across the country hold their own events. Some use local “drops” featuring objects such as peaches, pickles, or musical instruments, creating regional variations on the midnight countdown.

New Year's Eve is different from New Year's Day, which is January 1. The distinction matters because celebrations begin on the evening of December 31 but continue across midnight into the following date. The Gregorian calendar is used for civil dates in the United States, even though other calendars may mark new years at different times.