\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{arrows}
\usepackage{fontspec}
    \setmainfont{Charis SIL}
\begin{document}
% In the preamble:

\begin{tikzpicture}[label distance=5mm]
  \draw [<-, solid] (-3,0) node [] {} -- (0.45,0) node[midway,above,sloped] (TextNode) {\tiny Non-Future};
  \draw [->, solid] (0.45,0) node [] {} -- (3,0) node[midway,above,sloped] (TextNode) {\tiny Future};

 %\draw (0,-0.5) node[anchor=north]{\tiny Time};

     \draw [-, solid] (0.45,-0.1) node [] {} -- (0.45,0.1) node[midway,above] (TextNode) {\tiny };
      \draw (0,-0) node[circle,fill,inner sep=1pt]{};

 \draw (0,-0.4) node[anchor=south]{\tiny Now};


\end{tikzpicture}

\end{document}
