The Heineken Open'er Festival is a music festival which takes place on the North coast of Poland, in Gdynia. The first edition of the festival was organized in Warsaw in 2002 as Open Air Festival. The main organizer of the festival is the concert agency Alter Art, but the performance took its name from its principal sponsor, Heineken International. 2013 edition of Open'er was held from 3 July to 6 July. Open’er Festival was given the Best Major Festival prize on European Festival Awards awards ceremony in 2009 and 2010.