Eating 12 grapes at midnight on New Year's is both a tradition and a superstition in Spain. It's traditional to eat grapes as you hear the clock from Puerta del Sol in Madrid chiming, one grape for each stroke of the clock, Each grape represents a different month. almost mpossible to finish eating the grapes by time the clock finishes chiming but if you can do it, you will have 12 months of good luck.