I was wondering if it counts as two days, when you travel in the evening and at night by train. For instance, we want to depart at 09:00 PM and arrive 07:00 AM. This is within 24 hours, so does this count as one or two days of travelling, because it's not a night train.
Best answer by EdM
With flexi-passes, travel days always last 24 hours, but they also always begin and end at midnight, regardless of when in the day you catch your first train. After midnight, catching another train will initiate another travel day, but staying on one that you caught before midnight will not. The class of train - whether it’s a Railjet or a Night ICE - is irrelevant. So yes, you can travel overnight and only use one travel day, but only if you don’t change trains after midnight.
Hope this helps!