What is Century common year?
In the [[Gregorian calendar]], a '''century common year''' is a year that is divisible by 100 but not by 400. Therefore, like all other [[common year|common years]], these years do not have a [[February 29]]. This is the only case where a year that is divisible by 4 is a common year.<ref name=year>{{Cite web|last=Adams|first=Sean|title=2020 is a leap year: What that means, why we skip leap day every 100 years, and other questions answered|url=https://www.mcall.com/news/pennsylvania/mc-nws-pa-2020-leap-year-20200101-w3r447cdzrcs7mcdyjc2g5ykdu-story.html|access-date=2020-11-02|website=mcall.com}}</ref> In the obsolete [[Julian calendar]], all years divisible by 4, including century years, were [[leap year|leap years]]. This rule resulted in too many leap years, so the Gregorian calendar added a new rule that a century year must be divisible by 400 to be a leap year. This is why the years [[1600]], [[2000]], and [[2400]] are leap years, while [[1700]], [[1800]], [[1900]], [[2100]], [[2200]], and [[2300]] are common years even though they are all divisible by 4. The Gregorian calendar was introduced in 1582, so the first century common year was 1700.<ref name=year></ref> The start/end days of century common years varies. The century year begins and ends on [[Common year starting on Friday|Friday]] if the remainder obtained by dividing it by 400 is 100, [[Common year starting on Wednesday|Wednesday]] if the remainder is 200, and [[Common year starting on Monday|Monday]] if the remainder is 300. Therefore, [[century leap year]]s always begin on [[Leap year starting on Saturday|Saturday]], and ends on Sunday. ==References== [[Category:Years]] [[Category:Calendars]] <references />