Dear Tuesday,
So, the old rhyme goes:
Red sky at night, sailors’ delight
Red sky at morning, sailors take warning
I don’t recall yellow ever entering the conversation…
Love,
Kevin
(5 September 2017)
Ordinary Average Thoughts
Confounding expectations since 1963
Ordinary Average Thoughts 
I learned as a child it was shepherd’s delight.
That is apparently one of several variations. I learned of the saying from a book about a 16-year-old boy who sailed around the world solo. (https://en.wikipedia.org/wiki/Robin_Lee_Graham)
cool