In at least one, possibly several, of the Chalet School books, outbreaks of mischief and moods and minor spats are diagnosed as known and inevitable symptoms of Spring.
I was thinking about that early this morning after the binmen woke me at 4.35 and before I made tea, also before I knew the symptoms had manifested themselves not only all over the town streets and carparks and supermarket aisles yesterday, and on several threads on AIBU, but even here in the Bluestocking.
EMD indicated that dosing all and sundry with sulphur would sort it out. I suspect that that, like much of her medical lore, would be deemed dodgy nowadays.
I don't think she ever suggested a cure for the full moon.