Baltu vienības dienas koncerts is a special concert held on 20 September at the Great Hall of the “Lielais dzintars” Concert Hall in Liepāja. Organized by the Liepāja Music, Art and Design Secondary School in collaboration with the Lithuanian Choir Union, the event celebrates the close relationship and shared cultural heritage of Latvians and Lithuanians. The programme features Antonio Vivaldi’s "Gloria" alongside works by Latvian and Lithuanian composers, with musicians from both countries performing. The concert highlights unity between Baltic peoples and offers audiences a chance to experience the musical traditions of both nations.