conference name in "palette quaternary"

For a conference presentation, I have added conference name inside \date as

\date[conf-name]{conference long name 2013}


So, "conference long name 2013" is coming at the title page. So good so far. But I also want the short name to appear at the bottom of each page, I mean in quaternary position, instead of the title of my talk.

I am using

\mode<presentation>
{
\usetheme{Warsaw}
\setbeamercovered{transparent}
}


How can I do that? Edit: bolt from the blue: I have added \title[conf-name]{title} to have this effect.

You can redefine the footline template used by the split outer theme to use \insertshortdate instead of the default \insertshorttitle:

\documentclass{beamer}
\mode<presentation>
{
\usetheme{Warsaw}
\setbeamercovered{transparent}
}

\makeatletter
\setbeamertemplate{footline}
{%
\leavevmode%
\end{beamercolorbox}%
\end{beamercolorbox}}%
\vskip0pt%
}
\makeatother

\title{Title of the talk}
\date[conf-name]{conference long name 2013}

\begin{document}

\begin{frame}
\maketitle
\end{frame}

\end{document}