Saint Martin's Day is a regional special case. People searching from Burgenland usually want to know whether school is closed, whether shops open, whether work runs normally and where Martinigansl or Martiniloben events take place. People from other federal states need the short answer: it is not a general public holiday.
11 November has two layers: patron saint St Martin for Burgenland and the Austria-wide customs calendar with lanterns, goose, young wine and the start of carnival season. Both belong together, but different legal rules apply.