Zech 8:1-23
1 Again the word of the LORD of hosts came to me, saying,
2 Thus saith the LORD of hosts; I was jealous for Zion with great jealousy, and I was jealous for her with great  fury.

Of course, FATHER would be "jealous" for Jerusalem with great zeal. And, with great fury toward any who would  bring harm unto the city (the teaching of peace) and do harm unto those who love HIM.

Zech 8:
3 Thus saith the LORD; I am returned unto Zion, and will dwell in the midst of Jerusalem: and Jerusalem shall be called a city of truth; and the mountain of the LORD of hosts the holy mountain.

Let us read this from the Interlinear.
Thus saith the LORD: I am returned unto Zion.
And I will dwell in the midst of Jerusalem.
And Jerusalem shall be called a city of truth and the mountain of the LORD of hosts the holy mountain.

"Thus saith the LORD: I am returned unto Zion."
What did FATHER tell us?

Zech 1:3 Therefore say thou unto them, Thus saith the LORD of hosts; Turn ye unto me, saith the LORD of hosts,  and I will turn unto you, saith the LORD of hosts. (KJV)

"I am returned unto Zion" is to say that HE has turned again toward this "parched place".
The name "Zion" literally translates into "parched place", and refers to 'having been made spiritually dry'.

"And I will dwell in the midst of Jerusalem."
FATHER will dwell in the midst of the 'teaching of peace'.
This dwelling speaks not only of the land mass, the city of Jerusalem, but the place FATHER has been given  within the hearts of men.

"And Jerusalem shall be called a city of truth and the mountain of the LORD of hosts the holy mountain."
And, this place, in the hearts of HIS servants, shall be The assembly of HIS Holy Truth and The Government of the LORD.

Zech 8:
4 Thus saith the LORD of hosts; There shall yet old men and old women dwell in the streets of Jerusalem, and  every man with his staff in his hand for very age.
5 And the streets of the city shall be full of boys and girls playing in the streets thereof.
6 Thus saith the LORD of hosts; If it be marvellous in the eyes of the remnant of this people in these days, should it also be marvellous in mine eyes? saith the LORD of hosts.

"old men and old women" speaks of those men and women who are mature in HIS Truth (no matter their physical  age in the flesh).
"in the streets of Jerusalem" speaks of the venue for the teaching of YHVH'S Peace. In whatever venue FATHER provides, those who are mature in HIS Word shall teach. And, that which they shall teach is the only way that any can come to true 'peace', and that is through YAHSHUA, JESUS CHRIST, YHVH'S SAVIOR, and YHVH The FATHER.
What is in the hands of those who now teach and who shall (at a specific time) have the indwelling of YHVH'S HOLY SPIRIT?
The staff in the hands of FATHER'S shepherds can be used to ward off any who would attack HIS sheep, and used  to keep the sheep gathered in safety.
It can also be used as a support, whereby the servant does not stumble on the path.

"And the streets of the city shall be full of boys and girls playing in the streets thereof."
FATHER is so zealous and protective of HIS servants, that these can be as happy as children at play.

"Thus saith the LORD of hosts; If it be marvellous in the eyes of the remnant of this people in these days, should it also be marvellous in mine eyes? saith the LORD of hosts."

When the remnant of Israel see these spiritually mature servants teaching YHVH'S Truth, and seeing these servants so dearly protected and joyful, they shall look upon it as something so wonderful that they too shall desire these things. Would this not make YHVH happy, to see the remnant of Israel desiring HIM and HIS Truth, as well? Absolutely.

Please do not overlook the words "in these days".

Zech 8:
7 Thus saith the LORD of hosts; Behold, I will save my people from the east country, and from the west country;
8 And I will bring them, and they shall dwell in the midst of Jerusalem: and they shall be my people, and I will be their God, in truth and in righteousness.

But, the promise has been made. FATHER has made a covenant with 'Jerusalem'.
And, HE has made a contract with those who serve and shall serve HIM.

Are you living up to your part of this contract?

FATHER' HOLY SPIRIT, upon HIS Elect of Israel, shall call forth to all HIS people, with HIS Truth.
And, these shall be gathered and begin to dwell in the midst of 'the teaching of HIS Peace',
"and I will be their God, in truth and in righteousness."

Zech 8:
9 Thus saith the LORD of hosts; Let your hands be strong, ye that hear in these days these words by the mouth of the prophets, which were in the day that the foundation of the house of the LORD of hosts was laid, that the temple might be built.

Let your works be strengthened by the Word of The LORD.
To whom is HE speaking? "ye that hear in these days these words by the mouth of the prophets"
Have you and shall you retain the spiritual 'ears to hear' "in these days"?
Do you hear with understanding that which YHVH'S prophets brought forth?
These prophets of old were present in the day that "the foundation of the house of the LORD of hosts was laid".
Will you become a part of HIS Temple built upon HIS foundation?

Zech 8:
10 For before these days there was no hire for man, nor any hire for beast; neither was there any peace to him that went out or came in because of the affliction: for I set all men every one against his neighbour.

"For before these days" is to say, 'in the time of these days'.

Man and beasts shall not be lawfully allowed to do as FATHER had created and intended. They shall not be compensated or utilized fairly by man. We can see this with all the unnatural behavior they is so prominent in the world.
The words "because of the affliction" can be better thought of as 'because of the adversary'.

2 Tim 3:1-7
1 This know also, that in the last days perilous times shall come.
2 For men shall be lovers of their own selves, covetous, boasters, proud, blasphemers, disobedient to parents, unthankful, unholy,
3 Without natural affection, trucebreakers, false accusers, incontinent, fierce, despisers of those that are good,
4 Traitors, heady, highminded, lovers of pleasures more than lovers of God;
5 Having a form of godliness, but denying the power thereof: from such turn away.
6 For of this sort are they which creep into houses, and lead captive silly women laden with sins, led away with divers lusts,
7 Ever learning, and never able to come to the knowledge of the truth. (KJV)

Zech 8:
11 But now I will not be unto the residue of this people as in the former days, saith the LORD of hosts.
12 For the seed shall be prosperous; the vine shall give her fruit, and the ground shall give her increase, and the heavens shall give their dew; and I will cause the remnant of this people to possess all these things.

But at this specific time, in these days of which HE is speaking, FATHER shall mean even more unto those of the twelve tribes. For, HE shall cause the seeds of HIS Truth to be even more abundant. The Vine, YAHSHUA, shall bring forth much fruit. The true riches from FATHER shall be brought forth in the earth. And, the dew from Heaven shall cause many seeds to sprout forth. And, the remnant of 'YHVH Prevails' (Israel) shall inherit all things of YHVH.

John 15:5
5 I am the vine, ye are the branches: He that abideth in me, and I in him, the same bringeth forth much fruit: for without me ye can do nothing. (KJV)

Zech 8:
13 And it shall come to pass, that as ye were a curse among the heathen, O house of Judah, and house of Israel; so will I save you, and ye shall be a blessing: fear not, but let your hands be strong.

It shall come to pass, in the days of the very end events, that those who shall bring forth YHVH'S Truth, who the rest of the world had thought to be evil, shall be saved and become a blessing unto all the world (to all who will overcome).
Now, at this moment, the "house of Judah" (2 tribes) and "house of Israel" (the 10 tribes) are still separated.
But, during these days, they shall be brought together again.
FEAR NOT! Let your work for YHVH be strong!

Zech 8:
14 For thus saith the LORD of hosts; As I thought to punish you, when your fathers provoked me to wrath, saith  the LORD of hosts, and I repented not:

FATHER did bring about calamity unto our forefathers who had "provoked me to wrath".
This was necessary, and HE did not repent (think to be sorry) for this.
There is no new thing under the sun.

Zech 8:
15 So again have I thought in these days to do well unto Jerusalem and to the house of Judah: fear ye not.

Yet, FATHER has a purpose and plan for those who are of 'the teaching of HIS Peace' and the house of true Judah.
FEAR NOT!

Zech 8:
16 These are the things that ye shall do; Speak ye every man the truth to his neighbour; execute the judgment of truth and peace in your gates:
17 And let none of you imagine evil in your hearts against his neighbour; and love no false oath: for all these are things that I hate, saith the LORD.

These are that which FATHER expects from HIS goodly servants: "Speak ye every man the truth to his neighbour; execute the judgment of truth and peace in your gates:"

And, these are that which FATHER hates: "And let none of you imagine evil in your hearts against his neighbour; and love no false oath".

Zech 8:
18 And the word of the LORD of hosts came unto me, saying,
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.

Again, HE is speaking to "the house of Judah".
What are these "fast of the fourth month, and the fast of the fifth, and the fast of the seventh, and the fast of the tenth"?

"The fast of the fourth month" speaks of the ninth of Tammuz, when the city was broken up.

Jer 52:1-11
1 Zedekiah was one and twenty years old when he began to reign, and he reigned eleven years in Jerusalem. 
And his mother's name was Hamutal the daughter of Jeremiah of Libnah.
2 And he did that which was evil in the eyes of the LORD, according to all that Jehoiakim had done.
3 For through the anger of the LORD it came to pass in Jerusalem and Judah, till he had cast them out from his presence, that Zedekiah rebelled against the king of Babylon.
4 And it came to pass in the ninth year of his reign, in the tenth month, in the tenth day of the month, that Nebuchadrezzar king of Babylon came, he and all his army, against Jerusalem, and pitched against it, and built forts against it round about.
5 So the city was besieged unto the eleventh year of king Zedekiah.
6 And in the fourth month, in the ninth day of the month, the famine was sore in the city, so that there was no bread for the people of the land.
7 Then the city was broken up, and all the men of war fled, and went forth out of the city by night by the way of the gate between the two walls, which was by the king's garden; (now the Chaldeans were by the city round about:) and they went by the way of the plain.
8 But the army of the Chaldeans pursued after the king, and overtook Zedekiah in the plains of Jericho; and all his army was scattered from him.
9 Then they took the king, and carried him up unto the king of Babylon to Riblah in the land of Hamath; where he gave judgment upon him.
10 And the king of Babylon slew the sons of Zedekiah before his eyes: he slew also all the princes of Judah in Riblah.
11 Then he put out the eyes of Zedekiah; and the king of Babylon bound him in chains, and carried him to Babylon, and put him in prison till the day of his death. (KJV)

"and the fast of the fifth" speaks of the 10th of Ab, when the Temple and the houses were burnt.

Jer 52:12-26
12 Now in the fifth month, in the tenth day of the month, which was the nineteenth year of Nebuchadrezzar king of Babylon, came Nebuzaradan, captain of the guard, which served the king of Babylon, into Jerusalem,
13 And burned the house of the LORD, and the king's house; and all the houses of Jerusalem, and all the houses of the great men, burned he with fire:
14 And all the army of the Chaldeans, that were with the captain of the guard, brake down all the walls of Jerusalem round about.
15 Then Nebuzaradan the captain of the guard carried away captive certain of the poor of the people, and the residue of the people that remained in the city, and those that fell away, that fell to the king of Babylon, and the rest of the multitude.
16 But Nebuzaradan the captain of the guard left certain of the poor of the land for vinedressers and for husbandmen.
17 Also the pillars of brass that were in the house of the LORD, and the bases, and the brasen sea that was in the house of the LORD, the Chaldeans brake, and carried all the brass of them to Babylon.
18 The caldrons also, and the shovels, and the snuffers, and the bowls, and the spoons, and all the vessels of brass wherewith they ministered, took they away.
19 And the basons, and the firepans, and the bowls, and the caldrons, and the candlesticks, and the spoons, and the cups; that which was of gold in gold, and that which was of silver in silver, took the captain of the guard away.
20 The two pillars, one sea, and twelve brasen bulls that were under the bases, which king Solomon had made in the house of the LORD: the brass of all these vessels was without weight.
21 And concerning the pillars, the height of one pillar was eighteen cubits; and a fillet of twelve cubits did compass it; and the thickness thereof was four fingers: it was hollow.
22 And a chapiter of brass was upon it; and the height of one chapiter was five cubits, with network and pomegranates upon the chapiters round about, all of brass. The second pillar also and the pomegranates were like unto these.
23 And there were ninety and six pomegranates on a side; and all the pomegranates upon the network were an hundred round about.
24 And the captain of the guard took Seraiah the chief priest, and Zephaniah the second priest, and the three keepers of the door:
25 He took also out of the city an eunuch, which had the charge of the men of war; and seven men of them that were near the king's person, which were found in the city; and the principal scribe of the host, who mustered the people of the land; and threescore men of the people of the land, that were found in the midst of the city.
26 So Nebuzaradan the captain of the guard took them, and brought them to the king of Babylon to Riblah. (KJV)

"and the fast of the seventh" speaks of the 3rd of Tisri, when Gedaliah was slain by Ishmael, the son of Nethaniah.

Jer 41:1-18
1 Now it came to pass in the seventh month, that Ishmael the son of Nethaniah the son of Elishama, of the seed royal, and the princes of the king, even ten men with him, came unto Gedaliah the son of Ahikam to Mizpah; and there they did eat bread together in Mizpah.
2 Then arose Ishmael the son of Nethaniah, and the ten men that were with him, and smote Gedaliah the son of Ahikam the son of Shaphan with the sword, and slew him, whom the king of Babylon had made governor over the land.
3 Ishmael also slew all the Jews that were with him, even with Gedaliah, at Mizpah, and the Chaldeans that were found there, and the men of war.
4 And it came to pass the second day after he had slain Gedaliah, and no man knew it,
5 That there came certain from Shechem, from Shiloh, and from Samaria, even fourscore men, having their beards shaven, and their clothes rent, and having cut themselves, with offerings and incense in their hand, to bring them to the house of the LORD.
6 And Ishmael the son of Nethaniah went forth from Mizpah to meet them, weeping all along as he went: and it came to pass, as he met them, he said unto them, Come to Gedaliah the son of Ahikam.
7 And it was so, when they came into the midst of the city, that Ishmael the son of Nethaniah slew them, and cast them into the midst of the pit, he, and the men that were with him.
8 But ten men were found among them that said unto Ishmael, Slay us not: for we have treasures in the field, of wheat, and of barley, and of oil, and of honey. So he forbare, and slew them not among their brethren.
9 Now the pit wherein Ishmael had cast all the dead bodies of the men, whom he had slain because of Gedaliah, was it which Asa the king had made for fear of Baasha king of Israel: and Ishmael the son of Nethaniah filled it with them that were slain.
10 Then Ishmael carried away captive all the residue of the people that were in Mizpah, even the king's daughters, and all the people that remained in Mizpah, whom Nebuzaradan the captain of the guard had committed to Gedaliah the son of Ahikam: and Ishmael the son of Nethaniah carried them away captive, and departed to go over to the Ammonites.
11 But when Johanan the son of Kareah, and all the captains of the forces that were with him, heard of all the evil that Ishmael the son of Nethaniah had done,
12 Then they took all the men, and went to fight with Ishmael the son of Nethaniah, and found him by the great waters that are in Gibeon.
13 Now it came to pass, that when all the people which were with Ishmael saw Johanan the son of Kareah, and all the captains of the forces that were with him, then they were glad.
14 So all the people that Ishmael had carried away captive from Mizpah cast about and returned, and went unto Johanan the son of Kareah.
15 But Ishmael the son of Nethaniah escaped from Johanan with eight men, and went to the Ammonites.
16 Then took Johanan the son of Kareah, and all the captains of the forces that were with him, all the remnant of the people whom he had recovered from Ishmael the son of Nethaniah, from Mizpah, after that he had slain Gedaliah the son of Ahikam, even mighty men of war, and the women, and the children, and the eunuchs, whom he had brought again from Gibeon:
17 And they departed, and dwelt in the habitation of Chimham, which is by Bethlehem, to go to enter into Egypt,
18 Because of the Chaldeans: for they were afraid of them, because Ishmael the son of Nethaniah had slain Gedaliah the son of Ahikam, whom the king of Babylon made governor in the land. (KJV)

"and the fast of the tenth" speaks of the 10th of Tebeth, when the king of Babylon set his face against Jerusalem.

Ezek 24:1-27
1 Again in the ninth year, in the tenth month, in the tenth day of the month, the word of the LORD came unto me, saying,
2 Son of man, write thee the name of the day, even of this same day: the king of Babylon set himself against Jerusalem this same day.
3 And utter a parable unto the rebellious house, and say unto them, Thus saith the Lord GOD; Set on a pot, set it on, and also pour water into it:
4 Gather the pieces thereof into it, even every good piece, the thigh, and the shoulder; fill it with the choice bones.
5 Take the choice of the flock, and burn also the bones under it, and make it boil well, and let them seethe the bones of it therein.
6 Wherefore thus saith the Lord GOD; Woe to the bloody city, to the pot whose scum is therein, and whose scum is not gone out of it! bring it out piece by piece; let no lot fall upon it.
7 For her blood is in the midst of her; she set it upon the top of a rock; she poured it not upon the ground, to cover it with dust;
8 That it might cause fury to come up to take vengeance; I have set her blood upon the top of a rock, that it should not be covered.
9 Therefore thus saith the Lord GOD; Woe to the bloody city! I will even make the pile for fire great.
10 Heap on wood, kindle the fire, consume the flesh, and spice it well, and let the bones be burned.
11 Then set it empty upon the coals thereof, that the brass of it may be hot, and may burn, and that the filthiness of it may be molten in it, that the scum of it may be consumed.
12 She hath wearied herself with lies, and her great scum went not forth out of her: her scum shall be in the fire.
13 In thy filthiness is lewdness: because I have purged thee, and thou wast not purged, thou shalt not be purged from thy filthiness any more, till I have caused my fury to rest upon thee.
14 I the LORD have spoken it: it shall come to pass, and I will do it; I will not go back, neither will I spare, neither will I repent; according to thy ways, and according to thy doings, shall they judge thee, saith the Lord GOD.
15 Also the word of the LORD came unto me, saying,
16 Son of man, behold, I take away from thee the desire of thine eyes with a stroke: yet neither shalt thou mourn nor weep, neither shall thy tears run down.
17 Forbear to cry, make no mourning for the dead, bind the tire of thine head upon thee, and put on thy shoes upon thy feet, and cover not thy lips, and eat not the bread of men.
18 So I spake unto the people in the morning: and at even my wife died; and I did in the morning as I was commanded.
19 And the people said unto me, Wilt thou not tell us what these things are to us, that thou doest so?
20 Then I answered them, The word of the LORD came unto me, saying,
21 Speak unto the house of Israel, Thus saith the Lord GOD; Behold, I will profane my sanctuary, the excellency of your strength, the desire of your eyes, and that which your soul pitieth; and your sons and your daughters whom ye have left shall fall by the sword.
22 And ye shall do as I have done: ye shall not cover your lips, nor eat the bread of men.
23 And your tires shall be upon your heads, and your shoes upon your feet: ye shall not mourn nor weep; but ye shall pine away for your iniquities, and mourn one toward another.
24 Thus Ezekiel is unto you a sign: according to all that he hath done shall ye do: and when this cometh, ye shall know that I am the Lord GOD.
25 Also, thou son of man, shall it not be in the day when I take from them their strength, the joy of their glory, the desire of their eyes, and that whereupon they set their minds, their sons and their daughters,
26 That he that escapeth in that day shall come unto thee, to cause thee to hear it with thine ears?
27 In that day shall thy mouth be opened to him which is escaped, and thou shalt speak, and be no more dumb: and thou shalt be a sign unto them; and they shall know that I am the LORD. (KJV)

Now, these 'fasts' were appointed by man. The "feasts" spoken of in "shall be to the house of Judah joy and gladness, and cheerful feasts" speaks of that which was appointed by YHVH.
These "feasts" speak of 'appointed seasons'.

Zech 8:
20 Thus saith the LORD of hosts; It shall yet come to pass, that there shall come people, and the inhabitants of many cities:
21 And the inhabitants of one city shall go to another, saying, Let us go speedily to pray before the LORD, and to seek the LORD of hosts: I will go also.
22 Yea, many people and strong nations shall come to seek the LORD of hosts in Jerusalem, and to pray before the LORD.
23 Thus saith the LORD of hosts; In those days it shall come to pass, that ten men shall take hold out of all languages of the nations, even shall take hold of the skirt of him that is a Jew, saying, We will go with you: for we have heard that God is with you. (KJV)

Who are these "ten men" spoken of in "ten men shall take hold out of all languages of the nations, even shall take hold of the skirt of him that is a Jew, saying, We will go with you: for we have heard that God is with you."?

The number "ten" speaks of 'Testimony...Law and Responsibility'.

Let us be cautious of those who shall declare that they seek YHVH at that time.
For, not all shall be working or truly seeking YHVH.
Let us also remember that at this time there shall be ten supernatural fallen angels who shall be disguised as ten kings of old out of all nations (peoples).

We must learn to discern the good fruit from the bad.