Hobbit Day is celebrated on 22 September in honor of J.R.R. Tolkien’s fictional hobbits.
The date is associated with the birthdays of both Bilbo Baggins and Frodo Baggins. In the Shire, birthdays are important social occasions, and Bilbo’s famous eleventy-first birthday party begins The Lord of the Rings and marks his departure from Hobbiton.
The date is also Tolkien’s “birthday” in the Gregorian calendar for the fictional characters, though Tolkien himself was born on 3 January 1892. International Hobbit Day is commonly observed together with Tolkien Week, an annual celebration organized by the Tolkien Society.
The Shire Reckoning gives dates a different cultural setting from the modern calendar, and Tolkien’s chronology can involve conversions between systems. That is why the date is best understood as a real-world commemorative observance tied to the characters rather than as a modern birthday celebration within Middle-earth.