<page_title> Millennium </page_title> <section_title> Viewpoint 1: Strict usage </section_title> <table> <cell> AD 1 </cell> <cell> 1000 </cell> <cell> 1001 </cell> <cell> First one thousand years (millennium) </cell> <cell> Second millennium </cell> </table>
The first period of one thousand years runs from the beginning of AD 1 to the end of AD 1000, and the beginning of the second millennium took place at the beginning of 1001.