I would like to buy tickets for the night train from Zurich to Prague around Christmas time. This train is listed as number EN 50467 on the Austrian railways site and as EN 467 on the Czech railways site, and it is operated by the Czech rail service.
I currently cannot buy tickets on the Czech railways website since it says the date I want to travel is outside of the current window for their time tables, which at this moment (October 1st) only goes through December 9th. However, the train is listed on the Austrian railways website, it just says the ticket is unavailable when I try to purchase one.
Is there any way of knowing when tickets will become available for purchase, or of even buying a ticket through some other venue? I would like to go ahead and make hotel plans, but I'm worried I won't end up being able to get the train I am planning on.