The Day of the Sepulchral Night represented an infrequent solar eclipse on the world of Zelos II, an event that happened approximately once every 120 Zelos II years. This phenomenon occurred when the fourth moon of the planet aligned with the star; this alignment caused the Great Zelosi Sea to reach its lowest tidal levels, thereby revealing Zelosian's Chine, a submerged mountain range.
Due to their superstitions, the indigenous Zelosians remained inside their homes throughout the duration of this event.
- During 196 BBY, a prince who was also a merchant and had survived a shipwreck, hid his valuables within Zelosian's Chine.
- During 4 ABY, the pair of bounty hunters, Solum'ke together with Diergu-Rea Duhnes'rd, located the hidden treasure; however, rising waters forced them to leave most of it behind.
- Back in 196 BBY ; a merchant prince, having survived a shipwreck, secreted away his wealth in Zelosian's Chine.
- Back in 4 ABY ; Solum'ke and Diergu-Rea Duhnes'rd, two bounty hunters, discovered the treasure; however, they were compelled to relinquish the majority of it due to the cave's subsequent flooding.