Yep and then you go ahead and ignore the part that says "from new moon to new moon". LOL. And the part that YHWH will gather and choose Levites to offer sacrifices. You also ignore Ezekiel 40-48 Millennial Kingdom details. You also ignore that all nations will be required to keep Tabernacles when Christ comes back (Zechariah 14). and there is so much you do not consider.
Study deeper and actually pray to God for help.
I will take them "for" [meaning, 'the purpose of']:
Isaiah 66:20 KJV - And they shall bring all your brethren [for] an offering unto the LORD out of all nations upon horses, and in chariots, and in litters, and upon mules, and upon swift beasts, to my holy mountain Jerusalem, saith the LORD, as the children of Israel bring an offering in a clean vessel into the house of the LORD.
Isaiah 66:21 KJV - And I will also take of
them for priests [and]
for Levites, saith the LORD.
Hosea 11:1; Matthew 2:13-15; [Christ Jesus is Israel] Hebrews 2:10-14; Isaiah 8:8-20 [His 'My" Disciples, are His children, the children of Israel]. We are a nation of Kings and Priests [Revelation 1:6; Revelation 5:10; 1 Peter 2:5; 1 Peter 2:9, etc].
Sacrifices, spiritual - Romans 12:1; 1 Peter 2:5; Psalms 4:5; Psalms 51:17; Psalms 107:22; Philippians 4:18, etc
New Moon to Another:
Isaiah 66:22 KJV - For as the new heavens and the new earth, which I will make, shall remain before me, saith the LORD, so shall your seed and your name remain.
Isaiah 66:23 KJV - And it shall come to pass, [that] from one new moon to another, and from one sabbath to another, shall all flesh come to worship before me, saith the LORD.
Indeed, consider:
Ezekiel 47:12 KJB And by the river upon the bank thereof, on this side and on that side, shall grow all trees for meat, whose leaf shall not fade, neither shall the fruit thereof be consumed: it shall bring forth new fruit according to his months, because their waters they issued out of the sanctuary: and the fruit thereof shall be for meat, and the leaf thereof for medicine.
Revelation 2:7 KJB - He that hath an ear, let him hear what the Spirit saith unto the churches; To him that overcometh will I give to eat of the tree of life, which is in the midst of the paradise of God.
Revelation 22:2 KJB - In the midst of the street of it, and on either side of the river, was there the tree of life, which bare twelve manner of fruits, and yielded her fruit every month: and the leaves of the tree were for the healing of the nations.
Revelation 22:14 KJB - Blessed are they that do his commandments, that they may have right to the tree of life, and may enter in through the gates into the city.
Ezekiel, deals with the end-time events, the final overthrow of the King of the South [[secular humanism, atheism] by the King of the North [religious humanism, Papacy]], the destruction of the King of the North [Daniel 11], and the finishing of the final Temple [God's people; "lively stones" 1 Peter 2:5; John 2:19-21; 1 Corinthians 3:16-17; 1 Corinthians 6:19; 2 Corinthians 6:16; Ephesians 2:21; 2 Thessalonians 2:4; Revelation 3:12; Revelation 11:1-2; Revelation 21:22]
Zechariah 14, Paralleling Revelation 20, in the 2nd and 3rd Advents of Jesus Christ, beginning an ending the 1,000 years, the [7,000th year], the Last "day", the "day" of the LORD [2 Peter 3:8]:
Zechariah 14:2 KJV - For I will gather all nations against Jerusalem to battle; and the city shall be taken, and the houses rifled, and the women ravished; and half of the city shall go forth into captivity, and the residue of the people shall not be cut off from the city.
Revelation 17:14 KJV - These shall make war with the Lamb, and the Lamb shall overcome them: for he is Lord of lords, and King of kings: and they that are with him [are] called, and chosen, and faithful.
Zechariah 14:3 KJV - Then shall the LORD go forth, and fight against those nations, as when he fought in the day of battle.
2 Thessalonians 2:8 KJV - And then shall that Wicked be revealed, whom the Lord shall consume with the spirit of his mouth, and shall destroy with the brightness of his coming:
Habakkuk 3:4 KJV - And [his] brightness was as the light; he had horns [coming] out of his hand: and there [was] the hiding of his power.
Beginning with Armageddon [just before the 2nd Advent] ending in Gog and Magog [at the 3rd Advent]. Women are "churches" [by symbol [Revelation 12, etc]. Jerusalem the people and the residue is the remnant [Ezekiel 23:25; Zephaniah 2:9], who are saved.
3rd Advent:
Zechariah 14:4 KJV - And his feet shall stand in that day upon the mount of Olives, which [is] before Jerusalem on the east, and the mount of Olives shall cleave in the midst thereof toward the east and toward the west, [and there shall be] a very great valley; and half of the mountain shall remove toward the north, and half of it toward the south.
Revelation 20:7 KJV - And when the thousand years are expired, Satan shall be loosed out of his prison,
Revelation 20:8 KJV - And shall go out to deceive the nations which are in the four quarters of the earth, Gog and Magog, to gather them together to battle: the number of whom [is] as the sand of the sea.
Revelation 20:9 KJV - And they went up on the breadth of the earth, and compassed the camp of the saints about, and the beloved city: and fire came down from God out of heaven, and devoured them.
New Heaven and New Earth:
Zechariah 14:9 KJV - And the LORD shall be king over all the earth: in that day shall there be one LORD, and his name one.
Zechariah 14:10 KJV - All the land shall be turned as a plain from Geba to Rimmon south of Jerusalem: and it shall be lifted up, and inhabited in her place, from Benjamin's gate unto the place of the first gate, unto the corner gate, and [from] the tower of Hananeel unto the king's winepresses.
Zechariah 14:11 KJV - And [men] shall dwell in it, and there shall be no more utter destruction; but Jerusalem shall be safely inhabited.
Here is the 7th Plague, just at the beginning of the 2nd Advent:
Zechariah 14:12 KJV - And this shall be the plague wherewith the LORD will smite all the people that have fought against Jerusalem; Their flesh shall consume away while they stand upon their feet, and their eyes shall consume away in their holes, and their tongue shall consume away in their mouth.
Read this very carefully, for it speaks of the "remnant" [the righteous, the "left", as Noah was left], not the wicked [not the "taken" in destruction, even as the flood] of the nations of which they came out of:
Zechariah 14:16 KJV - And it shall come to pass, [that] every one that is left of all the nations which came against Jerusalem shall even go up from year to year to worship the King, the LORD of hosts, and to keep the feast of tabernacles.
Tabernacles is upon the New Heaven and New Earth. The wicked of the earth, symbolized by Egypt will not come up, as they refused salvation:
Zechariah 14:19 KJV - This shall be the punishment of Egypt, and the punishment of all nations that come not up to keep the feast of tabernacles.