Bilbo's 111th birthday party, in which he disappeared, leaving
Bag-End and all his belongings, including the Ring, to Frodo, who
had had his 33rd birthday on the same day, and come of age according
to Shire custom. The date was September 22 3001 of the Third Age.
The long and unusually cold winter of Third Age 2911. In the records
of the hobbits, it bears the name the Fell winter. During this
winter, the Brandywine River froze over and the Shire was invaded