Time Turner

Time Turner (also known as Doctor Whooves or Doctor Hooves) is an Earth pony who lives in Ponyville.

Biography
Time Turner keeps Ponyville's clocks in sync, sets the hourglass for cider competitions and takes care of all things timey-wimey.

Trivia

 * The phrase "timey-wimey" is commonly associated with the Tenth Doctor from long-running British sci-fi series Doctor Who. This is also where his fan-name originates, due to his resemblance to the Tenth Doctor.
 * A Time-Turner is a magical device capable of time travel in the Harry Potter series of books.