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Hermione was born on September 19, 1979 (she is the oldest of the trio)

Hermione started Hogwarts when she was eleven like everybody else but she turned twelve in her first month there. This happened every year making her older than most, if not all, of the people in her year.

In her real seventh year she would have been eighteen for the majority of it. Hermione went back for her seventh year the following year when she would have turned nineteen.

Thus Hermione was about three months off her twentieth birthday when she finally finished Hogwarts.

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9y ago

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