Decimal calendar
Template:Short description A decimal calendar is a calendar which includes units of time based on the decimal system. For example, a "decimal month" would consist of a year with 10 months and 36.52422 days per month.
History
Egyptian calendar
Template:Main The ancient Egyptian calendar consisted of twelve months, each divided into three weeks of ten days, with five intercalary days.<ref name=Egyptian>Template:Cite web</ref>
Calendar of Romulus
Template:Main The original Roman calendar consisted of ten months; however, the calendar year only lasted 304 days, with 61 days during winter not assigned to any month.<ref name=Roman>Template:Cite web</ref> The months of Ianuarius and Februarius were added to the calendar by Numa Pompilius in 700 BCE.<ref name=Roman/>
French Republican Calendar
Template:Main The French Republican Calendar was introduced (along with decimal time) in 1793, and was similar to the ancient Egyptian calendar.<ref name=French>Template:Cite journal</ref> It consisted of twelve months, each divided into three décades of ten days, with five or six intercalary days called sansculottides.<ref name=French/> The calendar was abolished by Napoleon on January 1, 1806.<ref name=French/>
Proposals
Template:See also The modern Gregorian calendar does not use decimal units of time; however, several proposed calendar systems do. None of these have achieved widespread use.Template:Example needed