People have seemingly always been fascinated with time, its passage, and keeping track of it. These sites help you trace the development of time measurement and timekeeping, from its earliest days of sundials to today's super-accurate atomic clocks.

Time and Time Measurement Today
In modern times, we can keep time down to the tiniest fraction of a second. People run their lives by time schedule. Phrases using time references are everywhere. See different ways to keep and measure time.

Timekeeping Through History
Trace the development of timekeeping with these helpful sites. Learn how the ancients kept track of time, and see how today's timekeepers aren't all that different.

Calendars Today
See how people keep track of days, weeks, months, and years today.

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Social Studies for Kids
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David White