Tafsir of Al-Mulk 67:26

Say, "The knowledge"—that is, the knowledge of its time—"is with Allah," the Almighty and Majestic. No one else knows it, as per His, the Almighty's, statement: "Say, 'Its knowledge is only with my Lord.'"

"And I am only a clear warner"—I warn you that the occurrence of what is promised is inevitable. As for the knowledge of the time of its occurrence, it is not part of the duties of warning.