User blog comment:Chaotic38/Estimated Choices Timeline/@comment-38116464-20190722070557/@comment-3452092-20190722144307

Not the user who did this, because sadly we haven't gotten any responses since May at present, so I can't answer on the TC&TF, but with ACoR, that's probably where the numbers come from, because the flashbacks always say eight years ago.

And it's totally cool if you want to make your own timeline. I just thought this would be a useful resource for you, because it already has some research done (mostly in the comments, because the blog post only shows the dates, not the reason for the dates while the comments show some of the reasons for some of the dates).