Public holidays in Barcelona, Catalonia, Spain for the year 2012 :

• January 1 - New Year's Day
• January 6 - Epiphany
• April 6 - Easter Friday
• April 9 - Easter Monday
• May 1 - Labour Day
• May 28 - Pentecost (local festivity in Barcelona )
• August 15 - Feast of the Assumption
• September 11 - National Day of Catalonia
• September 24 - La Merce Day (Patron Saint of Barcelona)
• October 12 - Spain's National Day
• November 1 - All Saints´ Day
• December 6 - Constitution Day
• December 8 - Feast of the Immaculate Conception
• December 25 - Christmas Day
• December 26 - Boxing Day
  

Except the mentioned 2 local holidays in Barcelona, the other festivities are valid for whole Catalonia, Spain.