The Millennium is a 1000-year period in which Jesus will reign on earth as King from His Millennial Temple in the Holy Land (Ezekiel 40-48, Rev 20), which will be built at the beginning of the Millennium. This period of time immediately follows His return, at the beginning of the Lord’s Day, which is just after the tribulation (Matt 24:29-31, Mark 13:24-27, Luke 21:20-28), at the 7th trumpet (Zech 9:14, Matt 24:30-31, 1Cor 15:52, 1Thess 4:16, Rev 11:15-19).
During this time, those who have not yet overcome passed the test of standing against satan will receive discipline and teaching from the elect for the entire time period (Ezekiel 44). Satan will be bound and held captive from the very start of the Millennium so that he will not be able to influence anyone or interfere with their spiritual growth (Isa 14:15-19, Rev 20:2-3). At the very end of the Millennium, satan will be once again released and allowed to do what he will to deceive anyone who will let their guard down (Rev 20:7-9). This will be the final test by satan to lead the children of God away from Him. Those who have learned their lesson and remain disciple will not be tempted by satan and will remain faithful to Jesus.
Just after this time of deception, will be the Great White Throne Judgment, in which those who had not yet overcome (the [spiritually] dead) will be judged by their works (Rev 20:11-13), and those who have remained faithful will be rewarded. Those whose names are not written in the Book of Life will be thrown into the Lake of Fire (Rev 20:14-15) to be blotted out, or erased, from existence (Deut 29:19-20, Psa 69:28, 109:13-15, Rev 3:5).
See Ezekiel 40-48, Revelation 20
