Red sky at morning

"Red sky at morning" is part of a common saying, "Red sky at morning, sailors take warning; red sky at night, sailors’ delight." This expression is a traditional weather proverb used by sailors and others to predict weather conditions based on the color of the sky at sunrise and sunset. The saying suggests that a red sky in the morning can indicate that a storm or bad weather is approaching, while a red sky at night often indicates that good weather is likely to come the following day.