TikZ table

\documentclass[tikz,border=10pt]{standalone}
\usetikzlibrary{matrix}
\begin{document}

\tikzset{ 
    table/.style={
        matrix of nodes,
        row sep=-\pgflinewidth,
        column sep=-\pgflinewidth,
        nodes={
            rectangle,
            draw=black,
            align=center
        },
        minimum height=1.5em,
        text depth=0.5ex,
        text height=2ex,
        nodes in empty cells,
%%
        every even row/.style={
            nodes={fill=gray!20}
        },
        column 1/.style={
            nodes={text width=2em,font=\bfseries}
        },
        row 1/.style={
            nodes={
                fill=black,
                text=white,
                font=\bfseries
            }
        }
    }
}

\begin{tikzpicture}

\matrix (first) [table,text width=6em]
{
& Monday   & Tuesday & Wednesday & Thursday & Friday\\
1   & A & B & C & D & E \\
2   & F & G & H & J & K \\
3   & A & B & C & D & E \\
4   & F & G & H & J & K \\
};


\end{tikzpicture}
\end{document}