Hi there. I spoke with staff at the cathedral who advised that the Botafumeiro would be used at 12 mass tomorrow (8 December). On the last feast day I think it was around 15 minutes before the mass time and a few pilgrims missed it because they arrived around 12 so probably best to arrive early. There were also people working on the crib at the back of the cathedral today so it might be worth a look. Buen Camino . El