We have a copy of the timeline of athas on site. This was originally crafted by Kevin Melka, back in the DS2 era.
We have added a few things to it, but it’s been largely unchanged since the DS2 era. Which means that we havn’t added anything from the 4e run.
I’m going to be doing some work on cleaning up the presentation of it; while I’m “in” there, I’d like to make a number of updates. Part of that will include getting the events of the DS4 timeline noted. I’m not necessarily sure that anything actually goes to the level of alternate history. Can anyone tell me if the 4e timeline negates anything in the established Prism Pentad timeline?
I’d also like to add sourcing information to the timeline, so you’ll be able to see where to find out more about a given event. That will likely be something I’ll be looking for help on, as it’s likely very easy to miss things going forward.