This happens every year with Nightjet and it still stresses people out. You’re told to book early, then you check a few months out and it just says “currently not reservable” with zero explanation.
From what I’ve seen, Nightjet usually opens bookings around 3 to 4 months in advance, but they’re inconsistent and sometimes hold dates back because of timetable changes or maintenance. Munich to Amsterdam is a popular route too, so it fills fast once it finally shows up.
Annoying part is there’s no clear date they publish. You basically have to keep checking or set alerts and jump on it as soon as it opens.
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