This is another Extended Timeline submod, but focusing on ancient dates (amongst other things). Playing your mod reminded me of when this mod was still updated, because of the great level of quality. My suggestion is that you asked the authors of Extended Timeline Expansion if you could integrate their mod into yours. That way Extended Timeline players could enjoy the ultimate submod.
Here's the link to the mod: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1361613352
Cheers :)