I have been trying to book my train from Amsterdam to Paris on Sept 15. I had tried several websites, including the Thalys site. For the dates, Sept 15 & 16, nothing is offered. I can book a ticket on the day before, the 14th or after the weekend, on the 17th. So I know, I think I know, it has nothing to do with booking less than 90 days out.
Does anyone have any insights? Gare du Nord closing for that weekend???