ホモテナシ

無事（ぶじ）, suggested by 桜い on 11 II 19. I like this one for 黄人, because it references the 禅語「無事是黄人」, but it could also be a tad too obvious.
再会（さいかい）, meeting again, which Fujiyo used in IV 23 when we practised together.
In Hurtebise 22, I used 無感情（むかんじょ） and 一炷（いっしゅ）, 1 incense length. Michele really liked the first one, the second one maybe was a bit priggish.
For Miya VII 23, I used 疑団（ぎだん）, which is the doubt that pushes the monks to continue their study.

I think 無感情 is good any time when the seasons are felt too strongly.
神の声（かみのこえ）, heard it used during summer when there was thunder, which was quite dramatic.
無事: Menglin said it's a good one to use at the end of the year, because then people are without having things to do.

A great list covering all 12 months
I'd like to use 森林欲（しんりんよく）, forest bathing, at some point. Not sure if its good, but it sounds like a good one to me.

During Hurtebise 22, I used あさかわ (straw hat for rain protection — but actually now I'm not sure if it's even correct) and a Genji chapter (はなちろさと). Of the last one I was damn proud, because it was raining heavily, and the chapter describes how Genji retires with some old ladies to bask in the days of yore.
For 七夕, there's heaps, but I like 星の涙（ほし　の　なみだ）.