Fireworks, music, alcoholic beverages and other forms of noise making is part of the New Year's Eve celebration. New Year's Eve is celebrated with parties and social gatherings spanning the transition of the year at midnight.
Italians call New Year's Eve Capodanno (the "head of the year") or Notte di San Silvestro (the night of St. Silvestro). Traditionally there are a set of rituals for the new year, such as wearing red underwear and getting rid of old or unused items by dropping them from the window, but this is and old tradition, followed by quite nobody today.
Dinner is traditionally eaten with parents and friends. It often includes zampone or cotechino (a kind of spiced Italian sausage) and lentils. At half past eight pm, The President of the Republic reads a television message of greetings to Italians.
At midnight, fireworks are displayed across Italy.
In Rome after having dinner with parents or friends, the rest of the night is meant to be celebrated in the streets with fireworks at midnight, music, alcoholics: everyone is greeting the New Year !