I did both the FotH and Raffles timelines while re-reading the book(s), noting down all the references to times and dates as I went (a meta method I enjoy generally—it enlivens a re-read!). I have vague ideas of doing one for Kidnapped at some point, though I've only just re-read that, so it'll probably be a while until the next time—I think it'd be fun, because (the impression I got from my re-read is that) it is dated quite precisely but all the dates are relative rather than absolute until near the end, so you'd have to work backwards and extrapolate. I support any plans of yours to make timelines for GitN and/or TWN!