Zechariah is a book of prophecies of a contemporary of Haggai. Zechariah urges the people to rebuild the Temple for he too believes in the imminent coming of the messianic kingdom. Both Zechariah and Haggai are concerned with the messianic hope and establishing Judah’s role in the fulfillment of that glorious hope.

Zechariah 8

8:19 Thus saith the LORD of hosts; The fast of the fourth month, and the fast of the fifth, and the fast of the seventh, and the fast of the tenth, shall be to the house of Judah joy and gladness, and cheerful feasts; therefore love the truth and peace.