The timeline was created from all the mutant editions ('84, 01' and '14).
The discord is
Year Zero Worlds discord, but besides taken part in some discussions and answered some questions, I haven't translated that much (that isn't really my job to do). Some information about the early years can be found in the core book and the three expansions, as well as in Ad Astra, but since the game takes place 250ish years from the bombs, their focus with the information in these books are more what happens now and recent past.