
\documentclass{report}
\makeatletter
\def\timenow{\@tempcnta\time
  \@tempcntb\@tempcnta
  \divide\@tempcntb60
  \ifnum10>\@tempcntb0\fi\number\@tempcntb
  \multiply\@tempcntb60
  \advance\@tempcnta-\@tempcntb
  \string:\ifnum10>\@tempcnta0\fi\number\@tempcnta}
\makeatother
\pagestyle{empty}
  
\begin{document}
Il est \timenow.
\end{document}
