There's no such date. "BCE" isn't a legally recognized dating format.
There's "BC" and there's "AD," but "BCE" and "CE" are figments of imaginative college profs and other politically correct nincompoops.
Earliest-found use of “vulgaris aerae” (Latin for Common Era) (1615). Johannes Kepler (1615). Joannis Keppleri Eclogae chronicae : ex epistolis doctissimorum aliquot virorum & suis mutuis, quibus examinantur tempora nobilissima: 1. Herodis Herodiadumque, 2. baptismi & ministerii Christi annorum non plus 2 1/4, 3. passionis, mortis et resurrectionis Dn. N. Iesu Christi, anno aerae nostrae vulgaris 31. non, ut vulgo 33., 4. belli Iudaici, quo funerata fuit cum Ierosolymis & Templo Synagoga Iudaica, sublatumque Vetus Testamentum. Inter alia & commentarius in locum Epiphanii obscurissimum de cyclo veteri Iudaeorum. (in Latin). Francofurti : Tampach. “anno aerae nostrae vulgaris”
CE=Christian era. BCE=Before Christ even!
These profs seem to be bitter,clinging to their atheism and delusions of grandeur.
B.C.E.—Before the common era, traced to begin in the reign of
Caesar Augustus. C.E. Common Era.. Just another way for academia to purge religion from all things scholarly. Wrote a paper once for a history course using B.C. (before Christ), and A.D. (Anno Dommini—in the year of our Lord), the professor initially wanted to count off 40 out of a possible 250 points for the paper. I asked him aside from that what it was in his view, he said it was otherwise a solid 250 point paper, but using B.C. and A.D. was not considered academically
professional. I raised caine with the department head and the academic affairs committee, he folded...