The theme of the 2024 Arbor Day was "Fulfilling the obligation to plant trees and build a beautiful China". The theme was to mobilize the citizens to participate in the Arbor Day, to build and enjoy the beautiful Nanjing City and the new practice of Chinese-style modern Nanjing. In addition, other Arbor Day themed activities included "Plant trees diligently to protect the environment; Cultivate flowers leisurely to make the earth beautiful","Cherish the green, cherish our common home","Be with the big trees" and so on. These topics emphasized the importance of green environmental protection and building a beautiful home.
Since we don't have the actual 'day 416 word story' here, it's really difficult to figure out the theme. If it's a story about a person's struggle and how they overcome difficulties, the theme could be perseverance. Or if it's about two people falling in love, the theme would be love. But without seeing the story, it's all just guesswork.
The theme might be duality. Night and day are two very different states, so the story could be exploring the differences and similarities between them, or how they co - exist.
The theme could be the passage of time and the changes it brings in one's life. It shows how a short period can feel like a lifetime when there are significant experiences.
Maybe the theme of the story is self-reflection and the realization of the importance of living in the present. It might explore how we often take our days for granted until something disrupts the norm.