Month names collection / metastudy

[eggyk]

It's possible that it was like that at first, but at this point I would confidently say that the vast majority of the entries that have been added have not been selected based on specific name variants. I would even go as far to say that their selection has been independent of specific month names in general; most of them were found via searching for "livre d'heures" or "calendrier" and then added regardless of how interesting they are.

If there was a negative selection bias against octobre, we would probably not expect such high numbers of them. In total, over 2x more Octobres have been added than Octembres, so if Octobre was common in the late 14thC, I would have expected to have found them more often. 

It's very possible that there is another bias somewhere. Perhaps calendars that contain Octembre are typically dated earlier because of the vernacular october? There's no evidence for that so far though, afaik. Most of the dating information leaves out why they are dated where they are, but many i've seen point out other reasons such as specific saints, dates, illustrations, or handwriting that point to a dating.

Edit: Another possible reason may be that many of the "15thC" entries are actually from the first quarter of the 15thC, but aren't contributing to that section. That doesn't address the lack of Octobres at the end of the 14thC though.