Pyromagic is the largest fireworks festival in the country. Every year it takes place in August, always in Szczecin, on the Oder River. This year, the sky above Szczecin will also be illuminated with colourful fireworks presented by pyrotechnic companies from all over the world.
More information about the event can be found here
Source: http://www.pyromagic.pl/, https://www.kiwiportal.pl/