The prophet Zechariah was a contemporary of Haggai. Both of them wrote to encourage the Jews who had returned to Jerusalem from their 70 years of Babylonian exile. Zechariah began to prophesy during the reign of Darius, king of Persia (Zech. 1:1), under whose governance the Jews were allowed to return and rebuild Jerusalem. He instructed them not only to return to Jerusalem, but to return to the Lord! This is a word to those who have gone astray. Return! Repent of your sins and return to the Lord of Hosts and He will surely return to you.