Donellan's Day, alternatively referred to as the Day of the Dispossessed, represented a significant holiday within the social framework of the Lost Tribe of Sith on the world of Kesh. This observance took place on the birthday of Donellan, who was the initial son of Grand Lord Nida Korsin. Donellan was aware that upon the death of his mother, who was the Grand Lord, the Lord Consort would face execution as per the customs of the Lost Tribe, thereby inherently positioning Donellan as the next Grand Lord. Nevertheless, Donellan's passing occurred before his ascension to leadership. Subsequently, Nida Korsin abolished the hereditary system of governance, replacing it with a merit-based approach to succession. Donellan's Day functioned as a cautionary message to the Sith, urging them to proactively pursue opportunities for advancement rather than repeating Donellan's error of indecision.
The annual celebration of Donellan's Day typically featured activities such as rake-riding, where uvak wranglers engaged in lethal combat within the Korsinata. During this occasion, the High Lords of the Lost Tribe adorned their individual viewing boxes, often engaging in competitive displays of opulence.
In 3960 BBY, during the Donellan's Day rake-riding event, Campion Dey made an attempt to assassinate Lillia Venn, who was the Grand Lord at the time.