Santa Coloma de Gramenet Summer Main Festival Activity · Santa Coloma de Gramenet, Barcelonès, Barcelona Image of Santa Coloma de Gramenet, not of the place itself. Summer Festa Major of Santa Coloma de Gramenet, held on the first weekend of September with about a hundred activities decentralised throughout the city. It originated in 1895, when it was created at the request of the well-off families who spent the summer in the town, as an occasion to welcome and see them off. Alongside it, the municipality also holds a winter Festa Major, on 31 December. 4-7 de setembre Photo: Enfo (CC BY-SA 4.0) What to see and do in Santa Coloma de Gramenet