A question about a book that specifies the lifespan of the Islamic Ummah and discusses determining the time of the Hour.

The student: Regarding what we discussed about the Hour, there is a book currently in the markets that talks about the date of the end of the duration of Islam. This book relies on hadiths, the least of which Shaykh Al-Albani authenticated. Three books have now been published: "The Minor Signs" states that all of them have occurred, and what remains of them are called events that take place after the emergence of some of the Major Signs, such as the Treasure of the Euphrates and the return of the green pastures, meaning the Arabian Peninsula. The book also mentions—of course, the book is endorsed by some scholars of Al-Azhar—and the hadiths in it are authentic... or Al-Albani graded them as good. It cites hadiths about the siege of al-'Ira, which is mentioned in a hadith from the Prophet (peace and blessings be upon him), and it cites the hadith of the hired workers. It brings up statements by Shaykh al-Islam... and he has a third book responding to those who responded to him, in which he says: "I am not the first to follow this path; Ibn Hajar, and also Ibn Rajab and Ibn Asakir, and many scholars, and Al-Suyuti, have spoken on this topic. So why do you deny me?" He says: "There are seventy years or sixty-eight years remaining, and then the Islamic Ummah will end. It may increase slightly or decrease slightly, but the knowledge of the Hour is with Allah (Glorified and Exalted is He), and this is the lifespan of the Islamic Ummah."

The Shaykh : There is no doubt that this is a lie, deception, and following of the ambiguous. We have a verse as clear as the sun: He repeated it. How can someone come and say: "I know it"? As for the lifespan of the Islamic Ummah, meaning that Islam will disappear after this period, someone might say that it is possible, and someone might say that it is not possible to know it, because the Hour will occur on the worst of creation so that it is not said: "Allah, Allah!" But we have no knowledge of this. So all of this is invalid, and all of this must be denied and refuted. As for the hadiths cited as evidence, one must first look at their chains and their authenticity. Not everything that so-and-so or so-and-so authenticates is authentic. Al-Bukhari (may Allah have mercy on him) may mention suspended narrations that he is certain are authentic, as they said: "If a suspended narration is stated with certainty, it is authentic in his view," and yet they are weak, from the Imam of the Muhaddithin. Second, if the examination of their authenticity is completed and they become authentic, one looks at their indication. It is not possible for authentic hadiths from the Prophet (peace and blessings be upon him) to indicate something contrary to what came in the Qur'an and contrary to what is explicit in the Sunnah. And the saying of the Messenger (peace and blessings be upon him): indicates that it is part of our religion to believe that no one has knowledge of the Hour.