Hobbit Day
From the One Wiki to Rule Them All, the Lord of the Rings Encyclopedia.
Hobbit Day is the birthday of both Bilbo and Frodo Baggins. Some fans have started celebrating September 22nd as Hobbit Day by having parties. Some fans of Tolkien's books also celebrate by going barefooted in honour of the hobbits, who do not wear shoes.
Some deep students of Tolkien however claim that it's a mistake to celebrate those characters birthday on our Gregorian calendar because the date "September 22nd" mentioned in the narrative refers to the Shire Calendar, which has significant divergences from ours; more accurately, Tolkien said that the Shire Calendar was in advance of or by some 10 days, which many tend to forget.
According to calculations, a suggested corresponding date is September 14.
Fans also usually celebrate March 25th as the Fall of Sauron.
