A Walk Through Time: The Evolution of Time Measurement through the Ages. An interesting article.
More about time measurement:
About Daylight Saving Time: history, rationale, laws and dates.
History of Clocks and Calendars: history, culture and development of clicks and calendars.
Clockworks: From Sundials to the Atomic Second (interactive online exhibition with videos and animated illustrations).
Calendars through the Ages: the history of calendars, the differences, various weekday connotations and origins and time line.
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