Though some of the older Caldecott winners have become dated over the years, and lost their appeal for young readers, there’s something timeless about this one. Perhaps it is the way the illustrations capture the passing of time and how the world changes over the years. It could be useful for lessons in the younger grades on how we measure the passing of time, by days, by months, by seasons and years. And besides, it’s just a good story. If your old copy could use refreshing, it’s worth updating.