Have you been skipping over references to time in the Bible because they seem too confusing? Professor Jack Finegan’s “Handbook of Biblical Chronology “clarifies those ancient systems of time reckoning and the biblical passages that use them.
Part 1, Principles of Chronology in the Ancient World, describes the origins of basic units of time and surveys the calendars used in the Ancient Near East through the Roman era. Part 2, Problems of Chronology in the Bible, discusses major periods of the Old Testament, as well as the lives of Jesus, John the Baptist, and the Apostles Peter and Paul.
Note: these books have slight imperfections.