\documentclass[tikz]{standalone}
\usepackage{datetime}
\begin{document}

\def\hours{\number\currenthour}
\def\minutes{\number\currentminute}
\def\seconds{\number\currentsecond}


\begin{tikzpicture}
	%\node {\Huge \number\currenthour};
	\draw[line width=0.2cm] (0,0) circle (5.1cm);
	% Minutes
	\foreach \i in {1,2,...,60}{
		\def\angle{\i*6}
		\draw[thin] (\angle:5cm) -- (\angle:4.9cm);
	}

	% 5 minutes
	\foreach \i in {1,2,...,12}{
		\def\angle{\i*-30+90}
		\draw[thin] (\angle:5cm) -- (\angle:4.5cm);
		\node at (\angle:4cm) {\Huge\i};
	};

	% Hour hand
	\def\angle{\hours*-30 + \minutes*-0.5 + \seconds*-0.008333 +90}
	\draw[line width=0.1cm] (0,0) -- (\angle:2.5cm);

	% Minute hand
	\def\angle{\minutes*-6 + \seconds*-0.1 +90}
	\draw[line width=0.05cm] (0,0) -- (\angle:4cm);

	% Second hand
	\def\angle{\seconds*-6+90}
	\draw[very thick,color=red] (\angle:-1cm) -- (\angle:4.5cm);
	\draw[line width=0.1cm,color=red] (\angle:-1cm) -- (\angle:-0.25cm);


	% Center dot
	\draw[fill=black] (0,0) circle (0.1cm);
\end{tikzpicture}

\end{document}
