mbg

That would also make it a ~400 day year(not 500) As for second thing I think we should avoid "age conversions". The characters are only as old as the writer makes them, not as they would look/perceived in RL. It might be. However if I had to guess, based on the depth of Brandon magic systems and how it is intervened in to to the very "fabric" of this word/universe(i.e. his little spren / quantum mechanics reference) I'd bet it is magic

There is a reference to his sixteen weeping day as well. Also fixed or no, this is the only baseline we have for reference, regardless two years ago are still two years ago. There is a very nice theory about the calendar and 500 day year, but I don't think this was confirmed by Brandon.

This is the missing link I was looking for. With that in mind, the event dated at 0, should be between the Hiorocracy(500 years ago) and "Last" desolation(4500 years ago). From what we know 'Day of Recreance' is the only major event in that period of time. ETA: additionally in one of the sources it said 2 years before the true desolation. It is possible and it would be nice to figure it out, but it wouldn't offer us much more detail, considering the text(Brandon don't go overboard with this like George Martin)

For sometime now, I was looking something that link those dates with the events and the date and this just what I was looking for With the above in mind, it has to be before ~700 years before the Hierocracy and 3300 after the "Last" Desolation. Only that comes to mind is 'The Day of Recreance'. Its possible.

That what I thought, untill I noticed this: Delenar: "...sounded a great deal like what the Hierocracy had said when it had tried to conquer the world five centuries before."

I belive that in the vision where Honor show delenar a possible future, in the very end we see its not only Roshar he seeks to end but the whole Cosmere. Yes, but with time the shard effect them.

Did anyone figured if or how the Alethi dates in the Epigraphs (i.e. year 1171-1173) correlate to the events taking place in the book? Also any idea from what event they started their count?

Whatever it is, I suspect that both the change of attitude observed in Gavilar and dying "crazy talk" related to its discovery.