Those in the second resurrection will be raised to life as physical, flesh-and-blood human beings. They will live in a peaceful, prosperous world free from the demonic influence of Satan. Evidently, God will grant them a hundred years of life to learn and accept His way.
Basic Doctrines: Eternal Judgment
The Last Great Day foreshadows the Great White Throne Judgment period. The prevalent conditions of the Millennium - God's government, peace, prosperity, etc. - will continue into this time, just as the Last Great Day follows the Feast of Tabernacles. From Isaiah 65:20, some speculate that this judgment will last a hundred years, the life span of a healthy individual.
Martin G. Collins
Holy Days: Last Great Day
Other Forerunner Commentary entries containing Isaiah 65:20: