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The year-numbering system as used for the Gregorian calendar is the most widespread civil calendar system used in the world today.The expression has been traced back to 1615, when it first appeared in a book by Johannes Kepler as the Latin usage and became more widely used in the mid-19th century by Jewish academics.
[T]he Christian calendar no longer belongs exclusively to Christians. – cast a wider net of inclusion" Some oppose the Common Era notation for explicitly religious reasons. Wilson speculated in his style guide that "if we do end by casting aside the AD/BC convention, almost certainly some will argue that we ought to cast aside as well the conventional numbering system [that is, the method of numbering years] itself, given its Christian basis." The short lived French Republican Calendar, for example, began with the first year of the French First Republic and rejected the seven-day week (with its connections to the Book of Genesis) for a ten-day week.Bede also introduced the practice of dating years before what he supposed was the year of birth of Jesus, and also refers to the common era as a synonym for vulgar era with "the fact that our Lord was born on the 4th year before the vulgar era, called Anno Domini, thus making (for example) the 42d year from his birth to correspond with the 38th of the common era..." The phrase "common era", in lower case, also appeared in the 19th century in a generic sense, not necessarily to refer to the Christian Era, but to any system of dates in common use throughout a civilization.Thus, "the common era of the Jews", Some Jewish academics were already using the CE and BCE abbreviations by the mid-19th century, such as in 1856, when Rabbi and historian Morris Jacob Raphall used the abbreviation in his book Post-Biblical History of The Jews.The story became national news and drew opposition from some politicians and church leaders.Weeks after the story broke, the Australian Curriculum, Assessment and Reporting Authority denied the rumour and stated that the BC/AD notation would remain, with CE and BCE as an optional suggested learning activity.In modern times various contemporary newspapers or other periodicals have adopted "chronicle" as part of their name.
Various fictional stories have also adopted "chronicle" as part of their title, to give an impression of epic proportion to their stories.
A dead chronicle is one where the author gathers his list of events up to the time of his writing, but does not record further events as they occur.
A live chronicle is where one or more authors add to a chronicle in a regular fashion, recording contemporary events shortly after they occur.
Because of the immediacy of the information, historians tend to value live chronicles, such as annals, over dead ones.
The term often refers to a book written by a chronicler in the Middle Ages describing historical events in a country, or the lives of a nobleman or a clergyman, although it is also applied to a record of public events.
The era preceding CE is known as before the Common or Current Era (BCE).