X-Men First Class - 2011 was released on:
USA: 25 May 2011 (New York City, New York) (premiere)
Argentina: 30 May 2011 (Buenos Aires) (premiere)
Belgium: 1 June 2011
Denmark: 1 June 2011
France: 1 June 2011
Ireland: 1 June 2011
Norway: 1 June 2011
Serbia: 1 June 2011
UK: 1 June 2011
Argentina: 2 June 2011
Australia: 2 June 2011
Belarus: 2 June 2011
Chile: 2 June 2011
Hong Kong: 2 June 2011
Hungary: 2 June 2011
Israel: 2 June 2011
Kazakhstan: 2 June 2011
Kuwait: 2 June 2011
Malaysia: 2 June 2011
Netherlands: 2 June 2011
Peru: 2 June 2011
Philippines: 2 June 2011
Russia: 2 June 2011
Singapore: 2 June 2011
South Korea: 2 June 2011
Thailand: 2 June 2011
Ukraine: 2 June 2011
Brazil: 3 June 2011
Canada: 3 June 2011
Colombia: 3 June 2011
Estonia: 3 June 2011
Finland: 3 June 2011
Iceland: 3 June 2011
Lithuania: 3 June 2011
Mexico: 3 June 2011
Panama: 3 June 2011
Paraguay: 3 June 2011
Poland: 3 June 2011
Spain: 3 June 2011
Sweden: 3 June 2011
Turkey: 3 June 2011
USA: 3 June 2011
Italy: 8 June 2011
Germany: 9 June 2011
Greece: 9 June 2011
Portugal: 9 June 2011
Bulgaria: 10 June 2011
India: 10 June 2011
Japan: 10 June 2011
Pakistan: 10 June 2011
Uruguay: 17 June 2011
Armenia: 18 June 2011
Georgia: 23 June 2011
Venezuela: 5 August 2011
Indonesia: 23 September 2011