What is the 1 day a year that Australia House (Gringots) is open for Harry Potte

Question: What is the 1 day a year that Australia House (Gringots) is open for Harry Potter fans to visit!?
Best Answer - Chosen by Asker:

The place is open more than once a year!. there are tours all the time!.!.

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I would like to know that too!.Www@QuestionHome@Com