The song 'First of May' by James Taylor celebrates the freshness and renewal associated with spring. It reflects themes of love, new beginnings, and the passage of time. The key themes include the rebirth that comes with the changing seasons, the tenderness of love awakened in spring, and the nostalgia of past memories. Particularly poignant moments in the song are when Taylor evokes the imagery of nature coming to life, which serves as a metaphor for personal rejuvenation and the blossoming of relationships.