"They Call It Stormy Monday" is a blues song that describes the singer's everyday struggles. The lyrics refer to various days of the week, describing how each day is filled with its own troubles and difficulties. The song suggests that life is tough, and each day brings new challenges and setbacks. The singer also mentions his longing for his lost lover. He asks for mercy from the Lord, hoping that his lover will return to him. This part of the song represents the common theme of blues music, which often deals with love lost and the hardships of life. Overall, "They Call It Stormy Monday" is a powerful and emotional blues song that captures the essence of the genre. It reflects the everyday lives of many people, who struggle to find happiness and peace amidst the chaos of modern life. The song has been covered by many artists over the years, cementing its place as a classic blues standard.