What is the name of the Spanish New Year's Eve tradition of eating one grape with each of twelve midnight chimes?

Las doce uvas de la suerte is the Spanish New Year's Eve tradition of eating one grape with each of twelve midnight chimes.

The phrase means “the twelve grapes of luck.” Each grape represents one month of the coming year, and finishing all twelve in time is associated with prosperity and good fortune. The custom is especially linked with Madrid’s Puerta del Sol, whose clock chimes are broadcast nationally.

The practice became widely popular in Spain around the start of the twentieth century. A commonly repeated story says that grape growers promoted it after a surplus harvest, although the tradition also had earlier associations with elite Madrid celebrations. The grapes are eaten with the clock’s twelve “cuartos” and then “campanadas,” a timing detail that can confuse visitors watching broadcasts. This is a specific Spanish custom, distinct from general midnight toasts elsewhere.