As I mentioned in the Christmas traditions post, firstly at the stroke of midnight on the 31st December you need to eat a grape on the chime of each bell. This tradition was said to be started in Spain because the king of Spain decided to give grapes to everybody to eat on New Year’s Eve when the harvest was a particularly big one about a hundred years ago. Others say it was the farmers’ way in Alicante to get people to eat the surplus, but who knows.
Wearing red under garments is also a hugely popular custom here, hence the reason you see so many red garments being sold at this time of year. The origins of this tradition was apparently started during the Middle Ages, when almost everything was forbidden. The colour red was always associated with the devil, blood or witchcraft. Even the planting and consumption of red crops such as tomatoes and peppers were banned. One could risk their lives dressing in red during that time. People wore red in secret because they believed red was the symbol of blood and life and that such a colour would bring them luck and fertility in the coming year. By the way, don’t get too attached to those new store bought knickers because according to tradition, you need to burn them the next day to ensure good heath, and happiness in the coming year.