\documentclass[border=0]{standalone}
\usepackage[
]{geometry}

% Colored lines in table, see
% https://ctan.math.illinois.edu/macros/latex/contrib/colortbl/colortbl.pdf
\usepackage{colortbl}

% Columns spanning multiple rows
\usepackage{multirow}

\begin{document}

% Remove cell padding from tabular environment
\renewcommand{\arraystretch}{0}

\begin{tabular}
% Column and vertical rules definitions
{
		@{}
	!{\color{black}\vline}
		p{1cm}
	!{\color{black}\vline}
		p{4.5cm}
	!{\color{black}\vline}
		p{4.5cm}
	!{\color{black}\vline}
		p{4.5cm}
	!{\color{black}\vline}
}
	\multicolumn{4}{l}{Month and Year:} \\
	\hline
		~~\textbf{Day} & \textbf{Tasks/Appointments} & \textbf{Financial} & \textbf{Communications} \\ \hline
		\multirow{5}{1cm}{Mo} & & &  \\ [4mm] \arrayrulecolor{red}\hline
		 & & & \\ [4mm] \arrayrulecolor{red}\hline
		 & & & \\ [4mm] \arrayrulecolor{red}\hline
		 & & & \\ [4mm] \arrayrulecolor{red}\hline
		 & & & \\ [4mm] \arrayrulecolor{black}\hline
		\begin{center}{\Large Tu}\end{center} & & & \\ [2.15cm] \hline
		\begin{center}{\Large We}\end{center} & & & \\ [2.15cm] \hline
		\begin{center}{\Large Th}\end{center} & & & \\ [2.15cm] \hline
		\begin{center}{\Large Fr}\end{center} & & & \\ [2.15cm] \hline
		\begin{center}{\Large Sa}\end{center} & & & \\ [2.15cm] \hline
		\begin{center}{\Large Su}\end{center} & & & \\ [2.15cm]
	\hline
\end{tabular}


\end{document}