I didn't ask Ossy Hoppe by myself for the exact dates but someone else said that he told her the following dates for Germany:

13.05. Düsseldorf
27.05. Stuttgart
28.05. München
29.05. Hessisch Lichtenau
31.05. Koblenz

I don't know if they are really true since there isn't any date in North Germany and none in East Germany and Düsseldorf and Koblenz are not too far from each other. So don't shoot me if they are wrong LOL.