Bilbo Baggins’s birthday in J.R.R. Tolkien’s stories is 22 September.
Bilbo was born on 22 September of the year 2890 of the Third Age. The date becomes especially memorable because Bilbo celebrates his eleventy-first birthday at the beginning of The Lord of the Rings. During the party, he gives a farewell speech, uses the One Ring to disappear, and leaves the Shire.
Frodo Baggins shares the same birthday, although he was born in 2968 of the Third Age. This makes 22 September an important date for both hobbits and for readers of Tolkien’s work. In the modern world, Tolkien fans mark it as Hobbit Day.
The date is occasionally mixed up with the publication date of The Hobbit, which was 21 September 1937. Those dates are close but refer to different things: one is a fictional birthday, while the other is a real-world publication date.