4th B.C. 3rd quarter of 2nd B.C. 1st quarter of 4th B.C. Late 2nd-Earliest 1st century B.C. End of 6th-Beginning of 5th B.C. 1st half of 1st A.D. 3rd quarter of 4th B.C. 275-225 B.C. 3rd B.C. 1st A.D. Late 5th B.C. Beginning of 1st B.C.-3rd quarter of 1st B.C. 2nd B.C. Early 5th B.C.-480 B.C. 4th quarter of 2nd B.C. Just before and after 300 B.C. 1st-Early 2nd A.D.