score:2
This information is available on the boarding pass:
So theoretically the bag drop to Amsterdam opened two and a half hours before departure. In practice, I dropped my bag off some six hours before departure (using the Express automated machine), that was OK. Before security, they scan boarding passes and it flashed red. Security guy checked the computer said I am very early and asked whether I know I can't come out and when I said I know he let me through. And my bag arrived to Amsterdam just fine.