Bilbo Baggins celebrates his 111th birthday in J.R.R. Tolkien’s The Fellowship of the Ring. The birthday party takes place in Hobbiton, where Bilbo gives a speech before using the One Ring to disappear from the gathering.
Bilbo’s unusual age establishes him as exceptionally old by hobbit standards while also connecting the opening of The Lord of the Rings to events in The Hobbit. He obtained the Ring during his earlier journey and has kept it for decades, which contributes to his unnaturally preserved appearance.
Bilbo’s party is held on the same date as Frodo Baggins’s birthday, 22 September. Frodo turns 33, the age at which hobbits traditionally come of age. A common mistake is to give Frodo’s age as the answer, but the question concerns Bilbo’s celebrated age: 111.
After the party, Bilbo leaves the Shire and eventually gives the Ring to Frodo, beginning the central quest of Tolkien’s larger story.