From Halopedia, the Halo wiki
The dark time, or dark times, is the translated name for a period after the reintroduction phase of the Conservation Measure. It was a time in which some of the species that were reintroduced into their homeworlds by the Forerunners became extinct. Within the shield world Onyx, before the activation of the rings, the Forerunners had left a holographic message warning of the dark times ahead and blessing the Reclaimers who may take refuge in this shelter. 000 Tragic Solitude, the monitor of Installation 00, chose his name during the dark times when he felt lonely and abandoned by his creators.
List of appearances
- Halo: Ghosts of Onyx (First mentioned)
- Halo 3
- Bestiarum (Mentioned only)
- Halo: Hunters in the Dark (Mentioned only)