Does anyone know when the winter timetables for European Railways will be on the Deutsche Bahn website?
Train timetables are usually posted 2-3 months in advance on the travel date. There is not specific "winter" train timetable.
The German Rail timetables are updated for about the second weekend in December. I don't know exactly when these schedules will come out. Sometimes you have to look at the schedule on the second Sunday in December to see any changes. Usually changes in the actual schedule times are small. Sometimes there are other, more important changes, like five years ago when they dropped the Mitfahrer discount.
As far as I remember, it was published on October 10 last year for the mid-December timetable change.