Some Bible teachers have taught that Noah knew the last day so we can know it also, because he was a righteous man of God.
But Noah did not know the Last Day, as God defines it in Mathew 24:36,
“But of that day and hour knoweth no [man], no, not the angels of heaven, but my Father only.”
which is the Last Day of all humanity , of ALL flesh, and the end of the Universe. It will be totally destroyed in its present form, never to be again in that form.
“But the day of the Lord will come as a thief in the night; in the which the heavens shall pass away with a great noise, and the elements shall melt with fervent heat, the earth also and the works that are therein shall be burned up.” 2 Peter 3:10
“And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea.” Revelation 21:1
So this is a totally different scenario than the temporal destruction of man, still allowing 8 people to exist and carry on the human race into the billions that exist now. The world continued on in its present form and exists as it does today, as if nothing had ever happened then.
Another point to be made is Noah was a prophet of God, Inspired by the Holy Sprit, and God was still writing the uncompleted gospel then . But now as we see in Revelation 22:18-19
18:“For I testify unto every man that heareth the words of the prophecy of this book, If any man shall add unto these things, God shall add unto him the plagues that are written in this book:”
19: “And--- if any man shall take away from the words of the book of this prophecy, God shall take away his part out of the book of life, and out of the holy city, and [from] the things which are written in this book.”
And anyone who adds to the established, inspired word of God in any form: Galatians 1:8-9
8:“ But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed.”
9: “As we said before, so say I now again, If any [man] preach any other gospel unto you than that ye have received, let him be accursed.”.
Complete Bible studies and doctrines taken only from the Bible, has established the truth that no one can know the exact day, or time of the Lord's coming. Yet, those who keep saying other wise are completely consistent with what God says about these heretics:
“Therefore hath he mercy on whom he will [have mercy], and whom he will he hardeneth.” Romans 9:18
“(According as it is written, God hath given them the spirit of slumber, eyes that they should not see, and ears that they should not hear;) unto this day.” Romans 11:8
Noah did NOT know the LAST DAY of mankind and the universe as we know it; in its final destruction and existence, yet to come. Noah knew a time told him by the Lord which was a subordinate event of preliminary destruction of mankind with the intent to continue on this race and world in its present form , not the “Last Day” of all humanity and the Universe in its present form and judgment Day of Christ for all humanity .
Harold Camping and those who follow his misleading and defiant doctrines are being allowed to be mislead, because they are accursed. God is pouring out strong delusion and they are being allowed to believe the lies: 2 Thessalonians 2:11
“And for this cause God shall send them strong delusion, that they should believe a lie:”
Once again : Noah knew what God inspired him to know as a prophet who had a very set purpose, in that time, while God was speaking to men directly and still using them for the purpose of His will and the drafting of the gospel in those days. He did NOT know the LAST DAY of ALL humanity, the end of this Universe and world and the judgment Day of Christ. There are currently more than 7 billion people in the world now and things are still going on as in the days of Sodom.