New Years Eve, or Old Years Day or Saint Sylvesters Day, is the evening of or the entire day of the last day of the year, on December 31 in the Gregorian calendar. New Years Eve is the name commonly given to December 31st, the last day of the year. New Years Eve is celebrated with parties, feasts, and fireworks in a lot of different cultures. There are Christians who go to a service at midnight. The festivities typically continue well into the first day of the new year. Who here is organizing some sort of New Years Eve bash or celebration? Then its time to start spreading the word early. Create stunning, attentiongrabbing New Years Eve posters in minutes.