What are some of the facts about the festival of San Fermín that could explain it to someone that doesn't know about it based on this text.

Context: The festival of San Fermín is a weeklong, historically rooted celebration held annually in the city of Pamplona, Navarre, in northern Spain. The celebrations start at noon on July 6 and continue until midnight on July 14. A firework starts off the celebrations and the popular song Pobre de mí is sung at the end. The most famous event is the running of the bulls, which begins at 8 in the morning from July 7 to 14, but the festival involves many other traditional and folkloric events. It is known locally as Sanfermines and is held in honour of Saint Fermin, the co-patron of Navarre.

Its events were central to the plot of The Sun Also Rises by Ernest Hemingway, which brought it to the general attention of the English-speaking world. It has become probably the most internationally renowned festival in Spain with over a million people coming to participate.

Answer: The festival has celebrations that last an entire week, made up of several festivities, from fireworks and a traditional closing song to the famous running of the bulls. It became world-renowned due to its feature on the novel The Sun Also Rises by Ernest Hemingway.