Show clock in beamer presentation

Question

Is there any possibility to add a clock to be shown in each slide using beamer?

Answer 1

There is a package called tdclock. However, to make it useable it must be patched. See https://tex.stackexchange.com/a/148464

\documentclass{beamer}
\usepackage[font=Helv,timeinterval=60]{tdclock}

\setbeamertemplate{headline}{\initclock\tiny{\tdyear-\tdmonth-\tdday\quad\tdhours:\tdminutes}}

\begin{document}
\begin{frame}{Frame title}
\dots
\end{frame}
\end{document}

Answer 2

impressive offers, among lot of other features, a clock that shows the time elapsed on the right upper corner. The clock is visible to audience also. The clock can be made visible/invisible by the short cut key t . For details of other features and short cuts refer to the impressive documentation (impressive.html, found in the same folder).