Early 6th B.C. 410-390 B.C. 1st quarter of 4th B.C. End of 6th B.C.-480 B.C. Early-Middle of 6th B.C. 2nd B.C. 490-480 B.C. 2nd-3rd quarter of 6th B.C. 290 B.C. 3rd quarter of 6th B.C. 150 B.C. 4th quarter of 2nd B.C. 7th B.C., down to beginning of last quarter 4th quarter of 5th B.C. 2nd-3rd quarter of 4th B.C., but not far down into 3rd quarter Late 7th-Early 6th B.C.
Well after middle of 1st B.C. Middle of 1st B.C.-Early years of 1st A.D. Early 1st B.C. 2nd half of 1st B.C. 50 B.C. 2nd-1st B.C. Late 2nd B.C.-86 B.C. Last years of 2nd B.C.-86 B.C.