Until that summer, I had kept count of all the moons since the time my brother and I were alone on the island. For each one that came and went I cut a mark in a pole beside the door of my house. There were many marks, from the roof to the floor. But after that summer I did not cut them any more. The passing of the moons now had come to mean little, and I only made marks to count the four seasons of the year. The last year I did not count those.
These lines appear midway through chapter 25. In chapter twenty-five, many things happen to mark the passing of time on the island of the blue dolphins; Rontu dies, a generation of otters comes and goes. This quotation shows that time the way the rest of the world sees it has come to mean little for Karana. She has now been on Ghalas-at many years, and her days have become indistinguishable one from the other.