The tradition of eating 12 grapes at midnight on New Year's Eve, rooted in Spanish culture, is believed to manifest good luck and prosperity for the coming year. The ritual involves eating one grape for each month, with a variation suggesting eating them under a table to attract love.The tradition of eating 12 grapes at midnight on New Year's Eve, rooted in Spanish culture, is believed to manifest good luck and prosperity for the coming year. The ritual involves eating one grape for each month, with a variation suggesting eating them under a table to attract love.