https://bugs.winehq.org/show_bug.cgi?id=53407
--- Comment #3 from Jonas winehq@jonass.user.lysator.liu.se --- The date picker seems to be available at another point in the program. If that may be of help.
To see it do something similar to above but do not Press ctrl-k/kontoutdrag. Instead: - Press Ctrl-R or click icon "Registrera". - Click in empty cell in column "Datum" on line 1, to set focus. - Double click in that empty cell. A date picker widget is shown.