Zechariah 8:18

“And the word of the Lord of hosts came unto me, saying.] The word of prophecy, as the Targum paraphrases it: here begins a new prophecy, respecting the abrogation of Jewish fasts, and the calling of the Gentiles.”

“The prophet answers the query (Zac 7:3) as to the fast in the fifth month, by a reply applying to all their fasts: these are to be turned into days of rejoicing. So Jesus replied to His disciples when similarly consulting Him as to why fasting was not imposed by Him, as it was by John the Baptist. When the Sun of righteousness shines, tears are dried up (Mat 9:15). So hereafter (Isa 35:10).”

“The last word of God gives, in connection with what precedes, the direct answer to the inquiry concerning the fast-days, and consists of three sayings, Zac 8:19, Zac 8:20, and Zac 8:23, of which the second and third explain the contents of the first more clearly. Zac 8:18 is the same as Zac 8:1 and Zac 8:7 and Zac 4:8. Zac 8:19. "Thus saith Jehovah of hosts: The fasting of the fourth, and the fasting of the fifth, and the fasting of the seventh, and the fasting of the tenth (months), will become pleasure and joy to the house of Judah, and good feasts. But truth and peace ye should love." On the fast-days mentioned, compare the exposition of Zac 7:3. These fast-days the Lord will turn into…”