Created ad bc dating system
According to the international standard for calendar dates, ISO 8601, both systems are acceptable.
The Anno Domini year–numbering system was introduced by a Christian monk named Dionysius Exiguus in the 6th century.
The most commonly used convention in radiocarbon dating. 1950 is the date that the calibration curves were established.
It also predates atmospheric testing of the atom bomb, which significantly upset C12/C14 ratios in the following years.
The year count starts with year 1 in the Gregorian calendar.
This is supposed to be the birth year of Jesus, although modern historians often conclude that he was born around 4 years earlier.
The western-style year dating convention commonly used in many parts of the world was created by the monk Dionysius Exiguus in or about the year AD 532.
The Year 2012 AD is 1433 AH (but the years don't have an exact match, because AH years are shorter!However, Exiguus' dating system still lacks a "0" year which makes calendrical calculations awkward.The "astronomical" dating system refers to an alternative method of numbering years. method during the Middle Ages, early in the sixth century. they prefer to use the phrase “Common Era,” abbreviated “C. C., which refers to the time “Before Christ,” they favor labeling that era “B. While they may not be the language of everyday life, the new terms BCE, Before Common Era and CE , Common Era (first invented in the sixth century AD) are now the rule in order to express politically correct sensitivity to non-Christians.