Overview
- December 31 marks the final day of the year in the Gregorian calendar and is widely recognized as New Year's Eve.
- Customs highlighted include family dinners in Argentina, eating twelve grapes at midnight in Spain, fireworks, and plate-breaking in Denmark and other Nordic countries.
- Outlets report that 2026 begins on Thursday and that January 1 is a public holiday across Argentina.
- The day's efemérides note milestones such as the 1999 transfer of the Panama Canal from the United States to Panama and the 1959 birth of actor Val Kilmer.
- Google marks the occasion with a New Year Doodle celebrating the close of 2025.