Open'er Festival, Gdynia, Poland

Where? Gdynia, Poland

When? 3-6 July

Poland's biggest music festival, the Heineken-sponsored Open'er, in Gdnyia, is this year headlined by a list of music heavyweights that includes Blur, the Arctic Monkeys, the Kings of Leon, Queens of the Stone Age and Rihanna. There's also a fashion stage, where upcoming designers can exhibit their wares to a daunting 80,000-strong audience.

For further information: www.opener.pl/en