The song "Blue Days, Black Nights" was written and recorded by Buddy Holly in 1955. It is a heartfelt ballad that expresses the pain and longing after a loved one has left. The song's lyrics depict a narrator who is experiencing sadness and loneliness. The "blue days" and "black nights" symbolize the narrator's emotional state, emphasizing the depths of their despair. The chorus reveals the deep longing for the person who has left. The narrator's heart is constantly calling out for them, indicating their strong desire to be with their loved one again. The mention of "blue tears" falling and the memories of the person causing sorrow show regret for past actions. The narrator acknowledges that they have given the person reasons to doubt their loyalty or love. They deeply regret their mistakes and now feel the pain of losing them. The second verse suggests that the narrator didn't realize just how much they would miss their loved one until they were gone. They express the realization that they will have to endure the consequences for the times they made the person feel sad or hurt. Despite the regrets and longing, the song portrays a sense of acceptance. The person is gone, and the narrator is left alone with only their memories. The song captures the bittersweet nature of reminiscing about the person and thinking about them fondly, even though they are no longer present. Overall, "Blue Days, Black Nights" is a poignant song about heartbreak, regret, and longing for a lost love. Buddy Holly's heartfelt vocals and the melancholic melody contribute to the emotional impact of the lyrics.