<Tr> <Td> </Td> <Td> This article does not cite any sources . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (July 2014) (Learn how and when to remove this template message) </Td> </Tr> <P> The civil calendar is the calendar, or possibly one of several calendars, used within a country for civil, official or administrative purposes . The civil calendar is almost always used for general purposes by people and private organizations . </P> <P> The most widespread civil calendar and de facto international standard is the Gregorian calendar . Though that calendar is associated with the Catholic Church and the papacy, it has been adopted, as a matter of convenience, by many secular and non-Christian countries although some countries use other calendars . </P> <P> Commonly, another calendar, or more than one, is used alongside the civil calendar . For example, Christian Churches have their own calendars, which they use to compute the dates for their own festivals, though most of these dates are then expressed relative to the civil calendar . In Christian terminology these festivals are called movable feasts . Very few Christian festivals are fixed in relation to the civil calendar, the most notable one being Christmas . </P>

Does the whole world use the gregorian calendar