Red sky at night, sailor's delight. Red sky in morning, sailor's warning

Shakespeare in his play, Venus and Adonis. “Like a red morn that ever yet betokened, Wreck to the seaman, tempest to the field, Sorrow to the shepherds, woe unto the birds, Gusts and foul flaws to herdmen and to herds.”

Jesus said, “When in evening, ye say, it will be fair weather: For the sky is red. And in the morning, it will be foul weather today; for the sky is red and lowering.” (Matthew XVI: 2-3,)

Sailors, farmers relied on it to navigate ships and plant crops.