To me the entire calendar seems at least a month too "fast". For example:
August 8–12 涼風至 Suzukaze itaru Cool winds blow
When early August anywhere in mainland Japan more closely resembles Satan's armpit, with extreme heat and humidity and a distinct lack of cool breezes.
It is worth noting that the day after December 2, 1872 was January 1, 1873. That's when Japan switched to the Julian Calendar. August 8 before that was... in September.
August 8–12 涼風至 Suzukaze itaru Cool winds blow
When early August anywhere in mainland Japan more closely resembles Satan's armpit, with extreme heat and humidity and a distinct lack of cool breezes.