<page_title> Elementary OS </page_title> <section_title> Summary table </section_title> <table> <cell> 0.1 <col_header> Version </col_header> </cell> <cell> Jupiter <col_header> Codename </col_header> </cell> <cell> 31 March 2011 <col_header> Release date </col_header> </cell> <cell> Ubuntu 10.10 <col_header> Base </col_header> </cell> </table>
The first version of elementary OS was Jupiter, published on 31 March 2011 and was based on Ubuntu 10.10.