Here begins the first of four great exhortational prophecies from Haggai to the people. It is 520 BC, and the king of the Medo-Persian Empire is the time reference, ‘in the second year of Darius the king, in the sixth month, in the first day of the month.
In 1 Chronicles 3:19 Zerubbabel is said to be the son of Pedaiah, who was the younger brother of Shealtiel. Whitcomb suggests that Shealtiel was childless, and Zerubbabel born to a levirite marriage between Pedaiah and his older brother’s widow, by which Zerubbabel was counted as the son of Shealtiel.