From Halopedia, the Halo wiki
- "If the weather held, tomorrow we would begin to plant. This put us on schedule to finish by the next lunar cycle, just before Rainfall, the third of five seasons in this moon's standard year. That could mean the best yields we had ever seen on this world, and the thought thrilled me."
- — Bornstellar-Makes-Eternal-Lasting, reflecting on his life in a new galaxy.
Rainfall was the name given to a season on the moon in an unknown galaxy to which Bornstellar-Makes-Eternal-Lasting and Chant-to-Green retired to live and raise their son. It was the third of five lunar cycles, or seasons, in the moon's standard year. As its name suggests, Rainfall was typically characterized by a period of heavy precipitation, which made for positive agricultural prospects for Bornstellar and his family, provided they had planted enough.