How Does Hermione Get The Time Turner From Dumbledore?

Hermione receives the Time-Turner from Professor McGonagall, who has arranged for her to use it to attend multiple classes occurring at the same time. McGonagall explains the device's purpose and grants Hermione permission to borrow it for the school year. Dumbledore is aware of Hermione's use of the Time-Turner, as he supports her academic endeavors, but it is McGonagall who directly provides it to her.