There's a lovely French word for that feeling ... which I am probably not spelling correctly but our French friends will help, I'm sure. Came across it in a French art song I learned years ago "L'heure Exquise" which translates as the exquisite hour meaning that lovely twilight time.
:
tristesse.
I know I said I'd not try non-English without something to copy in front of me but this is too good to let pass by.
Aide moi, mes amis,
wow