In the fourth year of King Darius. This happened, then, B.C. 518, nearly two years after the visions had occurred (Zechariah 1:7). In two years more the temple was finished (Ezra 6:15), and the work of rebuilding was now proceeding vigorously; it seemed a fit opportunity for inquiring whether, in this period of comparative prosperity and success, it behoved the people to continue the fast appointed in sadder times.
The word of the Lord came. This is the usual formula for introducing a revelation (Zechariah 1:1), but it is here placed in a peculiar position, dividing the date into two parts. Keil connects the last clause, which gives the day of the month, with the next verse; but this is against the traditional accentuation, and is not required by the wording of Zechariah 7:2.
The prophet first gives the date generally when the word came to him, and then defines it more accurately. Chisleu; Chislev (Nehemiah 1:1). This month corresponded to parts of November and December.