The Time Book: A Brief History from Lunar Calendars to Atomic Clocks by Martin Jenkins, illustrated by Richard Holland

From chapters.ca:
What is time? Why does it fl y when we're having fun? When did we start keeping track of it - and why do we measure it in such bizarre ways? Explore these and many other timely questions, such as how the first calendars and clocks were invented, why February is such an odd month, and what strange and wonderful things Einstein discovered about the nature of time itself. Martin Jenkins's clear, conversational narrative on the history of timekeeping combines with Richard Holland's quirky mixed-media collages for a compelling look at that mysterious thing we call time.