I have added a first attempt at the timeline for Book 12, The Gathering Storm, written by Brandon Sanderson from the notes and outlines left by Robert Jordan after his death. As you can see, there is significantly greater uncertainty in the timeline for this book compared to the previous several books. This is due to a couple of factors: (a) Sanderson's tendency to use approximate descriptions of time passing (e.g. "several days" and "a few weeks" rather than giving precise periods; and (b) his willingness to allow much greater out-of-chronological-sequence ordering of the chapters making up the individual plot threads than Jordan ever did. (In particular, Perrin's thread and the early part of Egwene's are significantly out of kilter with the rest.) I'm fairly confident that the general shape of the timeline is correct, but the precise placing of most of the entries should be regarded as provisional, pending further information.