Hermione's 2nd year at Hogwarts (sep 1, 1992 – jun 30, 1993)
When brewing polyjuice potion, a N.E.W.T level potion, she accidentally used cat hair instead of Pansy's hair. She was sent to the Hospital wing. Later, she was petrified by the basilisk. She saw its reflection in her mirror.
Added to timeline: