How to reply to Farooq Tejani on the date of the Hour?

**Surat No. 7 Ayat NO. 187 They ask you, [O Muhammad], about the Hour: when is its arrival? Say, "Its knowledge is only with my Lord. None will reveal its time except Him. It lays heavily upon the heavens and the earth. It will not come upon you except unexpectedly." They ask you as if you are familiar with it. Say, "Its knowledge is only with Allah , but most of the people do not know."** Farooq Tejani, who claims to "know" the date of the Hour as Muharram 01, 1532, says that "but 'most' of the people do not know" means that some people know when the Hour will come. How to respond to him?