Calendars which were in use in the past, but are no longer used.

To add an article to this category, put [[Category:Obsolete calendars]] in that article.

Hindu calendar

Coligny calendar

“The Soviet revolutionary calendar was in use in the Soviet Union from 1929 to 1940. Shortly...

Soviet revolutionary calendar

“The Gregorian calendar, although enjoying near universal acceptance, has sometimes been...

Decimal calendar

“The Babylonian calendar was a lunisolar calendar with years consisting of 12 lunar months, each...

Babylonian calendar

“The Roman calendar changed its form several times in the time between the foundation of Rome and...

Roman calendar

“The ancient civil Egyptian calendar, known as the Annus Vagus or "Wandering Year", had a year...

Egyptian calendar

“REDIRECT French Republican calendar

French Revolutionary Calendar