Gathering so much information is excessive, I know, and I hesitated to stick to the essentials. But I still found it interesting to have a comprehensive overview of the 20-year history of this very original version of the perpetual calendar.
When I do such posts, I’m not really looking for a favorite version: I just enjoy going through the whole series. But, as is often the case, I prefer the first, more classic, variants. Just my conservative taste of course.
Best, Emmanuel