In the second year of Darius the king, in the sixth month, on the first day of the month, the Word of Yahweh came by Haggai the prophet, to Zerubbabel, the son of Shealtiel, governor of Judah, and to Joshua the son of Jehozadak, the high priest, saying, Bible other translations

“In the second year of Darius.” Many scholars have concluded that the date in Haggai 1:1 is August 29, 520 BC. Since the Temple was burned in 586 BC, it had remained destroyed for 66 years. The fact that Haggai records this as the sixth month of Darius, we can tell he is using Nisan (Abib) as the first month of the year.

Commentary for: Haggai 1:1