[So I know you don't do this here - I know you don't, because you searched it - but in dath ilan we get administered temporary-mind-affecting-drugs once our brains have stabilized enough to be safe to poke a bit, so we can learn what it's like if our brain starts to malfunction and operate safely inside it. We're also trained to recognize common syndromes of insanity like psychosis, both in ourselves and in others.]
[I tried looking up what your world knows, if anything, about the effect of the moon on personality. I found a... fascinating... Network repository that I've been reading through for the last while. It turns out there's a whole suite of effects of planetary bodies on personality, besides just lunar eclipses - mostly having to do with the exact position of planets at people's time of birth, or possibly conception. However, natives of this world can't think about that subject without the underlying magic of this world rendering them locally insane. They can think about it at all, and notice the effects of the planets, but not think - validly. I'm concerned that you won't and possibly can't believe me, and the syndrome does not look exactly like psychosis or any single drug I've experienced. But I am very sure that any native of Earth who tries to think about the subject matter you call 'astrology' gets hit by the equivalent of a medium-strength mind-affecting-drug.]