Date and Time Period of the Book of Isaiah

Date - 760 - 720 BC Approximately. Isaiah prophesied during the reign of King Uzziah, King Jotham, King Ahaz, King Hezekiah, and probably King Manasseh of Judah. His prophetic ministry lasted from about 760 BC until about 720 BC.

Link: https://bible-history.com/old-testament/bookofisaiah