Dreams of conkers (horse chestnuts) raining down from the sky can symbolize a few different themes. Conkers are often associated with childhood games, nature, and the changing seasons. Here are some possible interpretations:

1. Nostalgia and Playfulness: This dream may represent a longing for simpler, more carefree times in your life. It could indicate that you desire to reconnect with your inner child or to find joy in everyday experiences.
2. Abundance and Good Fortune: Raining conkers can symbolize abundance and unexpected gifts. This may suggest that you are entering a phase where opportunities or good fortune are coming your way.
3. Change and Transition: The imagery of something falling from the sky often relates to change. This could signify that you are experiencing or anticipating changes in your life, especially those related to nature or the passage of time.
4. Protection: In some cultures, conkers are seen as protective charms against negativity. This dream might indicate that you are seeking protection or that you feel safe and secure in your current environment.

Consider how you felt during the dream and any personal associations you have with conkers, as these can provide additional insights into your specific situation.