Open'er is an annual music festival held in Gdynia, Poland. It typically takes place in early July and features a diverse lineup of international and local artists across various genres, including rock, pop, and electronic music. The festival attracts thousands of attendees each year, making it one of the largest music events in Central Europe. In addition to music performances, Open'er offers a range of activities, including art installations, workshops, and food stalls. The festival is known for its vibrant atmosphere and scenic location near the Gdynia Airport, providing a unique experience for festival-goers and music lovers alike.