Month names collection / metastudy

[davidma]

I feel the next step would be doing some serious archival work at BnF or the Belgian, Swiss and Lixemburghish equivalents to look for livres d'heures and mémoires from Picardie, Lorraine, and other French speaking border territories in Belgium luxembourg and Switzerland. Unfortunately that takes a lot of time and would probably be better suited for a professional researcher.