Catalan tradition

April 23rd, Catalonia celebrates Sant Jordi’s day.

The legend of Sant Jordi says that many years ago in the town called Montblanc there was a dragon which had terrorized the population. This dragon ate the beasts of the population, but one day the animals were finished and then the people began to do raffles to know who was going to be the ate, and one day it touched the princess, the king cried a lot, but nobody listened to him because he was not the only disconsolate father. When the dragon was going to eat the princess appeared a white knight on a white horse who killed the dragon. Of that large pool of
blood grew a rose and its branches borned red roses. Then the white knight( Sant
Jordi) gava to the princess one of these roses.

Is for that reason why in Spain the boy should give a rose to the girl, and the girl should give a books to the boy.