Name of Fiesta that was held on September 10th in Santiago?

Does anyone know the name of the Fiesta held in Praza do Obradoiro on September 10th in Santiago de Compostela?

I am making a Camino photobook for my sister and I can't remember. I also can't find any reference to it on the Internet. It was huge with lots of groups dressed up in costumes and dancing and competing against each other and very loud music! It was a fantastic spectacle.

Many thanks

Clare

I saw that, but it just looks like music festival (bands), I couldn't see any reference to the costumes and fiesta element. The costumes were very elaborate and varied with lots of masks etc.