Luke 1:5-7

The parents of John. ἐγένετο, there was, or there lived. ἐν ταῖς ἡ., etc.: in the days, the reign, of Herod, king of Judaea. Herod died 750 A.C., and the Christian era begins with 753 A.C. This date is too late by three or four years. ἐξ ἐφημερίας Ἀβιά : ἐφημερία (a noun formed from ἐφημέριος - ον, daily, lasting for a day), not in profane authors, here and in Luke 1:8 in N. T., in Sept [3], in Chron. and Nehemiah, = (1) a service lasting for a day, or for days a week; (2) a class of priests performing that service. The priests were divided into twenty-four classes, the organisation dating according to the tradition in Chronicles (1 Chronicles 24) from the time of David. The order of Abia was the eighth (1 Chronicles 24:10). Josephus (Ant., vii., 14, 7) uses ἐφημερίς and πατρία to denote a class. On the priesthood and the temple worship and the daily service, consult Schürer's History, Div. ii., vol. i., pp. 207 298. γυνὴ · a daughter of Aaron; John descended from priestly parents on both sides.

[3] Septuagint.