The Spanish name for New Year's Eve and its late-night celebration is Nochevieja.
Nochevieja literally means “old night.” In Spanish-speaking communities, it refers to December 31 and commonly includes a special dinner, the midnight grape tradition, toasts, music, and gatherings that continue into New Year's Day. The exact foods and customs vary between Spain and Latin American countries, so the word does not identify one single menu or regional ritual.
In Spain, many people watch the clock at Madrid's Puerta del Sol and eat twelve grapes with the midnight chimes. Afterward, celebrations may continue at home, restaurants, public squares, or clubs. “Nochevieja” can therefore describe both the date and the social occasion surrounding it.
It is easy to confuse Nochevieja with Nochebuena. Nochebuena means Christmas Eve, December 24, while Nochevieja means New Year's Eve, December 31. Navidad means Christmas more broadly, not specifically the final night of the year.