The traditional Dutch name for the midnight New Year's Eve celebration is Oud en Nieuw.
Oud en Nieuw literally means “old and new,” referring to the transition from the old year to the new one. Dutch households commonly mark the occasion with oliebollen, deep-fried dough balls that may contain raisins or currants and are usually dusted with powdered sugar. Fireworks, champagne, and visits with family or friends are also common parts of the celebration.
The food is closely associated with the season and is sold by temporary stalls and bakeries in the weeks surrounding New Year's. Dutch New Year's customs can also include appelflappen, a fried apple pastry. Local rules governing consumer fireworks and public displays may change over time, but the food tradition remains widely recognizable.
Oud en Nieuw should not be confused with Koningsdag, the King's official birthday celebration, or Sinterklaasavond, associated with Saint Nicholas festivities in early December. The phrase specifically identifies the New Year transition rather than a general Dutch public holiday.