From revue Küsse um Mitternacht. Jewish author Katscher left Vienna for the US in '38.
Paul Whiteman [as When Day Is Done; n°2 US; English lyrics: Buddy De Sylva]
Harry Archer [idem]
Nat Shilkret [idem]
Mildred Bailey [idem]
Al Jolson [who also cut The Wonder Bar, another Robert Katscher composition used in the eponymous musical and film, introduced in Vienna as Die Wunderbar]