Here is what the calculation would look like: Let us consider for a moment how to derive and use this formula for dates. As you can see, with the starting number at -5, you count forward 10 and it takes you to 5 (note that the zero count is under the -5 on the number line and you count forward from that to 10).

The derivation is based on very simple arithmetic so should not be hard to understand. So, here is a graphic to illustrate the calculation. But this is a standard number line which has a zero. As you can plainly see, counting forward 10 years from 5 BC on the BC - AD time scale takes you to 6 AD.

Ninety-five percent of the activity of Oxalic Acid from the year 1950 is equal to the measured activity of the absolute radiocarbon standard which is 1890 wood.

This is the International Radiocarbon Dating Standard.

Much of the information presented in this section is based upon the Stuiver and Polach (1977) paper "Discussion: Reporting of C14 data". 1890 wood was chosen as the radiocarbon standard because it was growing prior to the fossil fuel effects of the industrial revolution.

A copy of this paper may be found in the Radiocarbon Home Page The radiocarbon age of a sample is obtained by measurement of the residual radioactivity. T (National Institute of Standards and Technology; Gaithersburg, Maryland, USA) Oxalic Acid I (C). The activity of 1890 wood is corrected for radioactive decay to 1950.

BCE, along with CE, were said to have been developed so as not to be connoted purely on Christian origins. BC means before Christ, whereas BCE means before the Common Era. You agree that we have no liability for any damages.

It stands for ‘Before Christ.’ This was the undisputed notation only until recently, when several movements came forth that challenged the BC AD notation.

The reason why they started to question the original notation, is because it was already scientifically measured, using the most accurate technologies, that Christ was actually born sometime in the BC era (7-4 BC).

To cater to religious diversity, the abbreviations BCE (Before Common Era) and CE (Common Era) can be used to replace BC and AD.

Of note, AD is written before the year, while BC, BCE, and CE are written after the year.