A "rainy day" metaphorically represents a time of difficulty or hardship. Just as rain can disrupt plans and create challenges, a rainy day in life often signifies unexpected problems or emotional struggles. It serves as a reminder that everyone faces tough times, and these moments can feel overwhelming, much like a storm. However, the metaphor also carries a sense of hope. Just as rain nourishes the earth and leads to growth, challenging times can foster resilience and personal development. After the rain, the sun often shines again, symbolizing recovery and brighter days ahead, much like the arrival of spring after a long winter.