France administers Réunion Island, including its New Year's Eve celebrations.
Réunion is an overseas department and region of France in the western Indian Ocean, east of Madagascar and southwest of Mauritius. Because it is French territory, it uses the euro and follows French public-administration structures, even though its geography and cultural life are strongly shaped by the Indian Ocean.
New Year's Eve on Réunion combines French traditions with local Creole, African, Asian, and island influences. Public and family celebrations take place during the Southern Hemisphere summer, so the season is different from the winter imagery often associated with European New Year events.
Réunion is sometimes mistakenly described as an independent Indian Ocean country or confused with nearby Mauritius. It is not sovereign: the island is an integral part of the French Republic and is represented in French political institutions. This administrative status makes France the precise answer when a question asks which country governs the island.