Session Zero was announced by the Initial Announcement. It was introduced with the Session Zero Script and its events created Toosehn Year One.
It was split into Sessions 0 and 0.5 due to scheduling and time restraints. Session 0 took place on August 19th, 2023, while Session 0.5 took place on September 3, 2023. Session 0.5 picked back up where we left off, Autumn of The Quiet Year.