The word “millennium” means 1,000 years.
It is appropriate to review where Luke recorded by The Holy Spirit in Luke chapter 1:
26 Now in the sixth month the angel Gabriel was sent by God to a city of Galilee named Nazareth,
27 to a virgin betrothed to a man whose name was Joseph, of the house of David. The virgin’s name was Mary.
28 And having come in, the angel said to her, “Rejoice, highly favored one, the Lord is with you; blessed are you among women!”
29 But when she saw him, she was troubled at his saying, and considered what manner of greeting this was.
30 Then the angel said to her, “Do not be afraid, Mary, for you have found favor with God.
31 And behold, you will conceive in your womb and bring forth a Son, and shall call His name JESUS.
32 He will be great, and will be called the Son of the Highest; and the Lord God will give Him the throne of His father David.
33 And He will reign over the house of Jacob forever, and of His Kingdom there will be no end.”
Where is the throne of David? It is on the earth, not Heaven! It did not exist during the time of Jesus’ earthly ministry and is yet to exist today.
It is also written by THE SPIRIT in 2nd Samuel chapter 7:
10 Moreover I will appoint a place for My people Israel, and will plant them, that they may dwell in a place of their own and move no more; nor shall the sons of wickedness oppress them anymore, as previously,
11 since the time that I commanded judges to be over My people Israel, and have caused you to rest from all your enemies. Also the LORD tells you that He will make you a house.
12 “When your days are fulfilled and you rest with your fathers, I will set up your seed after you, who will come from your body, and I will establish His Kingdom. 13 He shall build a house for My Name, and I will establish the Throne of His Kingdom forever.
How long is forever?
And in Isaiah chapter 9:
6 For unto us a Child is born, Unto us a Son is given; And the government will be upon His Shoulder. And His Name will be called Wonderful, Counselor, Mighty God, Everlasting Father, Prince of Peace.
7 Of the increase of His government and peace There will be no end, Upon the Throne of David and over His Kingdom, To order it and establish it with judgment and justice From that time forward, even forever. The zeal of the LORD of hosts will perform this.
There will be no end, it is eternal!
It is important to differentiate prophecy from prediction. Soulish man predicts based on his experience, research, and limited perspective. True prophecy comes from The Holy Spirit Who receives It from GOD THE FATHER. This is why it is vital to be led by The Holy Spirit in these last days.
Even to the point that FATHER makes an oath in Psalm chapter 89:
34 My covenant I will not break, Nor alter the Word that has gone out of My Lips.
35 Once I have sworn by My Holiness; I will not lie to David:
36 His Seed shall endure forever, And His Throne as the sun before Me;
37 It shall be established forever like the moon, Even like the faithful witness in the sky.” Selah
The Beloved Disciple wrote by The Holy Spirit in Revelation chapter 20:
1 Then I saw an angel coming down from Heaven, having the key to the bottomless pit (Gr: abousso appears 7 times in Revelation) and a great chain in his hand.
2 He laid hold of the dragon, that serpent of old, who is the Devil and Satan, and bound him for a thousand years;
3 and he cast him into the bottomless pit, and shut him up, and set a seal on him, so that he should deceive the nations no more till the thousand years were finished. But after these things he must be released for a little while.
Satan is not an equal counterpart to Jesus Christ. An unnamed angel is who bounded satan for a thousand years. Once the perfect Sacrifice occurred, the devil’s primary power was the ability to promote deception.
4 And I saw thrones, and they sat on them, and judgment was committed to them. Then I saw the souls of those who had been beheaded for their witness to Jesus and for the Word of God, who had not worshiped the beast or his image, and had not received his mark on their foreheads or on their hands. And they lived and reigned with Christ for a thousand years.
We now see four classes of people: Old Testament Saints, The Church, Tribulation Martyrs, Tribulation Saints who did not worship the beast.
5 But the rest of the dead did not live again until the thousand years were finished. This is the first resurrection.
6 Blessed and Holy is he who has part in the first resurrection. Over such the second death has no power, but they shall be priests of God and of Christ, and shall reign (as kings) with Him a thousand years.
The redeemed are kings and priests. Physical death is the separation of the body and soul. Spiritual death is the separation of the soul from GOD!