late in Paris, France; Mitko chasing the school bus in Sofia, Bulgaria; and Khanh having a little nap in Hanoi, Vietnam! Clotilde Perrin takes readers eastward from the Greenwich meridian, from day to night, with each page portraying one of (the original) 24 time zones. Strong back matter empowers readers to learn about the history of timekeeping and time zones, and to explore where each of the characters lives on the world map. A distinctive educational tool, this picture book's warm, unique illustrations also make it a joy to read aloud and admire.