Title: Measuring time
Description: Readers learn what the calendar measures and why knowing how to measure days, weeks, months, and years is important. They learn the history of the lunar and solar calendars, how days and months get their names, and the different calendars around the world. Sidebars instruct math by showing readers how to add and subtract days.
Subjects: Time, Time measurements, Juvenile literature, Clocks and watches, Measurement, Calendar, Measurement, juvenile literature, Calendars, Calendars, juvenile literature