Warning! This article contains spoilers for Silo season 2’s episode 8.After dropping subtle clues surrounding Silo 17’s timeline, Silo season 2’s episode 9 finally reveals when its rebellion took place relative to the show’s present events. Instead of continuing where Silo season 1 ends, season 2 begins with a flashback that walks through everything that happened in Silo 17 before its rebellious citizens overpowered the IT and headed out into the world. After giving a glimpse of the silo Steven Zahn’s Solo grew up in, Silo season 2 switches to the present events and unfolds Juliette and Silo 18’s story.

https://screenrant.com/how-long-ago-the-rebellion-happened-in-silo-17/