September Fiesta 2024 - Piera from September 5 to September 11. Past days. Thursday, September 5 Friday, September 6 Saturday, September 7 Sunday, September 8 Monday, September 9 Tuesday, September 10 Wednesday, September 11 You might be also interested in: Fiesta of Les Planes 2024 - Les Planes - 41 Kms. Wine Harvest festival 2024 - Alella - 63 Kms.