Douglas Harper's Etymology Dictionary
B.C.E.
initialism (acronym) for "Before Common Era" or "Before Christian Era," 1881; see C.E. A secular alternative to B.C.
Usage examples of "b.c.e.".
The Babylonians, of course, had destroyed the Temple in 586 b.c.e. But that didn't stop the Jews from rebuilding it in the exact same location.
Construction of the second Jewish Temple began in 520 b.c.e. and came to completion around 20 b.