1940
28 March – 5 April
Together with such other composers as Vasyl Barvinsky, Stanyslav Lyudkevych, Mykola Kolessa, Tadeusz Kassern, and Adam Sołtys, Koffler travels from Lwów (Lvov) to Kyiv for the All-Union Plenum of the Organising Committee of the Union of Soviet Composers. The delegates present reports, attend concerts and debates. The audience in Kyiv has the first opportunity to hear Koffler’s music (a performance of his Symphony No. 2).

Знаменательный пленум [Significant Plenum], Советская музыкa [Soviet Music] 1940 no. 7