- "Before Present."
the notation commonly used on radiocarbon dates, e.g. 1,000 B.P. = 1,000 years
before 1950 A.D., or approximately 1,000 A.D.
- Before Present. Where present is
define as the year 1950 A.D. Therefore, 1949 B.P. would be the year 1 A.D. and
1951 B.P. would be the year 1 B.C.
- years before present; as a convention, 1950 is the year from which B.P. dates