[resolutebat]

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.

[glandium]

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.

[resolutebat]

A-ha! Now those dates make more sense.

[yamazakiwi]

Yeah, I've seen snow in Tokyo but you go farther south and snow becomes very rare. So imagine mainland would vary a lot too.