Thank you for the mention and including the link to my poem. I enjoyed yours.

I learned of the form from Christine Graves, who says it's simply 4 haiku stanzas plus an ending couplet with no rhyming scheme. To me, 14 lines does not a sonnet make, it needs a rhyming scheme. Thus, I went with the rhyme scheme of a terza rima sonnet, which is aba bcb cdc ded aa.

I like the definition of gloaming you mentioned and how your poem reflects it