Donellan's Day, also called the Day of the Disposessed, was a holiday in the Lost Tribe of Sith society. It was held on the birthday of Grand Lord Nida Korsin's firstborn son, Donellan. During his mother's reign as Grand Lord, Donellan knew that upon the death of his mother, the Lord Consort would be put to death according to Lost Tribe tradition, therefore making Donellan Grand Lord by default. However, Donellan died before he came to power, and Nida Korsin subsequently ended the dynastic system of government and instituted succession based on merit. Donellan's Day served as a warning to the Sith, in order to encourage them to make their move to rise to power, instead of making Donellan's mistake of hesitating.