robedits, I just replayed the game.
When you enter the hut, go to the chain (with a round handle) at the left back corner and pull it to stop the windmill. Then turn the wheel 3x to get the gear up. Pull the chain again and the windmill will work again.
Maybe you should save the game after entering the hut to get a fresh start with the chain and wheel.
Enter the date and pull the lever. You will see the place you can go to.