The season precesses ~one step every ~3 cycles (a cycle is 28 days longer than the 4×84-day season-year). Book 1 is fixed at Cycles 16–17; Books 2–6 are not cycle-locked (OD-103) — read the weather of whichever cycle a later book uses.
Each cohort wakes one fortnight; the lozenge is coloured by the season it wakes into, with that cohort's passengers listed beneath. Cohort→week mapping is fixed every cycle; only the season precesses. (working) = shown but not a locked cohort assignment.