The Los Angeles Times uses 1939 as an example in this article on streaming.
Here’s a snippet:

“Teng Li, the principal violist of the Toronto Symphony Orchestra, got interested in what the viola landscape was like in 1939, the year Hindemith wrote one of the more important sonatas for her instrument. A terrible year, the German composer was on the verge of immigrating to America, and Li has surrounded Hindemith’s Viola Sonata with a moving collection of works by two less fortunate Jewish Czech composers — Viktor Ullmann and Gideon Klein — who died in Auschwitz; a score by Joseph Jongen who fled to England when the Nazis arrived in Belgium; and a short piece by Hua Yanjun from Li’s native China, also war-torn in 1939.” full feature here.