At The Same Moment Around the World (Clotilde Perrin)

This book draws you in first because it's an unusual shape for a children's book: really long and tall! Best surprise at the end: A fold out page! The illustrations are amazingly detailed and I found myself pausing on each page to soak it all in. This could be a good start for Social Studies

Goodreads says:

Discover Benedict drinking hot chocolate 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.

Just a Second (Steve Jenkins)

This is a great book for teaching time! It talks about what can happen in one second, one minute, one day, one week, one month, one year, and even what can happen in less than a second. It also talks about things that take a really long time and occur very rarely. Kids who love facts will love this book....on other words, all kids will love it!