While investigating this excellent timeline resource for the Wheel of Time series, I noticed the invented names of months in the leftmost column: Aine, Adar, Saven, Amadaine, Tammaz, Maighdal, Choren, Shaldine, Nesan, Danu, Taisham, Jumara, and Saban.
What is the canonicity of these month names, and where did they originate?
I don't recall any reference to them in the main text, and certainly can't imagine all of them being mentioned (one or two maybe, offhandedly, but not all thirteen listed out). Unlike Lord of the Rings, the Wheel of Time series doesn't have lengthy appendices in which such issues as calendars and family trees are covered in detail. It does have per-book glossaries, but I had a quick look there and found only a description of the year-numbering scheme, not the months used within each year.
I'd be interested in any canonical info that exists about this calendar system: where it's used (in-universe), when it originated, and so on.