That's cool, I hadn't ever heard about Sweden's double-leap years. I did some research on calendars a while back, and notably, the conversion to Gregorian had

That's cool, I hadn't ever heard about Sweden's double-leap years. I did some research on calendars a while back, and notably, the conversion to Gregorian had a lot of religious overtones. Here's what I wrote about it: https://webcache.googleusercontent.com/search?q=cache:xrRtualQoz8J:https://curtisautery.appspot.com/5779342353235968 https://webcache.googleusercontent.com/search?q=cache:xrRtua... (edit ...and Google cache is being ornery right now.)