Your first one was easier . . . the 5am Dark Forest crash was a known issue that I've seen several people report (myself included).
12am crashes or Day 35 crashes . . . not so much.
Of the mods in your load order now, the only one that jumps out at me as being known to sometimes cause time-related crashes is Verona House Bloodlines. But you said you had already tried disabling your quest mods, which I assume included VHB?
EDIT: Do you still crash if you use the console to coc to an interior test cell (like TestingHall) before crossing that time barrier? What about if you turn off AI first (with the tai console command)?