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Week -- from Eric Weisstein's World of Astronomy
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Calendars > Weeks v



Week
    

Essentially, any period of time shorter than a month and longer than a day . In normal usage, a week is a unit of time defined as 7 days . Two weeks are called a fortnight . The Mayan calendar had two different weeks of 13 and 20 days. The French revolutionary calendar had 10-day weeks.

Day , Fortnight , French Revolutionary Calendar , Mayan Calendar , Month




References

Hollon, B. "An Introduction to Calendars." http://www.12x30.net/intro.html .