Dating systems history
As former UN General Secretary Kofi Annan put it in a statement marking the turn of the millennium: The Christian calendar no longer belongs exclusively to Christians.' For some, these are fighting words: the Southern Baptist Convention resolved, also in 2000, to resist the 'revisionism' implicit in the CE/BCEsystem and to retain AD 'as a reminder to those in this secular age ... The AD/BC chronology is not so ancient as some proponents suppose; nor is the CE/BCE system so recent.
For the first five centuries of their religion, Christians marked time according to local conventions, usually from the legendary foundation of Rome (753 BC), or from the Diocletian reforms (284 AD).
But if Jesus used a calendar, it would not have been the one we use.
Our calendar is called the Gregorian calendar and was instituted by Pope Gregory XIII in 1582. Quite a few societies have used calendars linked to the years their kings ruled.
It is a centuries-old argument that some maintain is integral to one’s identity as a Christian.
And I have spent far too much time on Wikipedia changing BCs and ADs back to BCEs and CEs.
Some simply appeal to arguments of tradition and familiarity with the system.
Still many other Christians object to the “scientific” origin of this designation.
Christians have offered many reasons for maintaining the BC/AD system.The first two parts—the month and date—have had a legion of originators, from Cro-Magnon astronomers marking phases of the moon on their eagle bones, to Mayan mystics tracking the movements of the stars from their forest canopies. Tests date the Earth to about 4.54 billion years old, but a whole lot of that time didn't really have anything of substance—to us humans, at least.The 365-and-change-day calendar we use is the result of scientific sweat, an attempt to bring us to a Verifiable Truth regarding how long it takes the Earth to complete one rotation around the sun. Starting a calendar 4.54 billion years ago doesn't make much intuitive sense.Persians, Mayans, Jains, even Freemasons, all have their own eras.But it is the Christian era, counting 'the years of the Lord' from the birth of Christ, that is now ubiquitous in business, politics and historical writing.
According to these systems, we count time backwards Before the Common Era (B.