Timeline of Events

The current calendar is based specifically on the founding of Kairos following the Cataclysm and is properly denoted A.K. (for "After (the founding of) Kairos"). The other major cities of the archipelago have generally standardized to use this calendar as well.

Timeline
~0: The Cataclysm; Kairos, Freeport, and Kanara are founded

Sept. 2311: WM Season 1 begins

June 2312: The Krakening; Season 1 ends

At some point in this time, Dragonsreach is abandoned.

Sept. 2319: WM Season 2 begins

June 2320: The Battle for Kanara; Season 2 ends

Sept. 2323: New Gork is founded; WM Season 3 begins (setting updates)

June 2324: The Great Storm threatens New Gork; Season 3 ends

June 2329: WM Season 3.5 begins (setting updates)

Aug. 2329: The Deathstrider threatens New Gork; Livbringaren is reclaimed; Season 3.5 ends

Sept. 2344: WM Season 4 begins (setting updates)

June 2345: The Seeker attacks New Gork; Season 4 ends

Sept. 2371: WM Season 5 begins (setting updates)

Out-of-Character Timeline
The calendar of West Marches matches the real-world calendar for days and months.

Season 1 occurred over the 2017-18 school year

Season 2 occurred over the 2018-19 school year

Season 3 occurred over the 2019-20 school year

Season 3.5 occurred during summer quarter of 2020

Season 4 occurred over the 2020-21 school year

Season 5 will occur over the 2021-22 school year