Which Spanish New Year's Eve tradition asks people to eat one grape with each of the 12 midnight clock chimes?

Las doce uvas de la suerte is the Spanish New Year’s Eve tradition of eating 12 lucky grapes with the midnight chimes.

Each grape represents one month of the coming year. Participants try to eat one grape at each of the 12 strokes, and successfully completing the sequence is popularly associated with prosperity or good luck. Families and friends often watch the chimes together on television or in public squares.

Madrid’s Puerta del Sol is especially famous for its clock, whose chimes are broadcast across Spain. The custom became widely established in the early twentieth century, with one often-cited explanation linking its popularity to a surplus grape harvest promoted by growers.

The grapes are sometimes confused with a dessert or a particular grape variety. The defining feature is the number twelve and the timing with the midnight chimes.