Dates can be expressed as AD, BC, BCE (before common era), and BP (before present). The accepted way to represent C-14 ages is in terms of years BP, where the year 1950 is used as the present. (1950 is the date that the calibration curves were established.

What does BP in history stand for?

Before Present Before Present (BP) years, or years before present is a time scale used mainly in archaeology, geology, and other scientific disciplines to specify when events occurred before the origin of practical radiocarbon dating in the 1950s.

What does BC and CE stand for?

Common Era Common Era/Full name