4-day journal for A4 paper with dot grid

grid_journal.tex

\documentclass[a4paper]{article}
\usepackage[margin=0pt]{geometry}
\usepackage{xcolor}

%% https://tex.stackexchange.com/a/162467
\usepackage{background}
\usetikzlibrary{decorations.markings,calc}

\def\Step{0.5}      %% separation between dots
\def\Size{0.5pt}    %% radius of the dot
\def\Toty{59}       %% number of dots in each axis
\def\Totx{42}

\newsavebox{\mybox}
\sbox{\mybox}{
\begin{tikzpicture}[remember picture]
    \foreach \y in {1,2,...,\Toty}{
        \foreach \x in {1,2,...,\Totx}
          \draw[fill=black,opacity=0.7,shift={(\Step*\x cm,\Step*\y cm)}] (0,) circle[radius=\Size];
    }
\end{tikzpicture}
}

\backgroundsetup{
scale=1,
angle=0,
position={current page.center},
contents={
    \begin{tikzpicture}[remember picture,overlay]
      \node at (current page.center) {\usebox\mybox};
    \end{tikzpicture}
  }
}

\begin{document}

\begin{minipage}[t][0.04\textheight]{\textwidth}
\end{minipage}

\hrulefill

\hspace{0.198\textwidth}\vline
\begin{minipage}[t][0.22\textheight][c]{0.7\textwidth}
\end{minipage}

\hrulefill

\hspace{0.198\textwidth}\vline
\begin{minipage}[t][0.22\textheight][c]{0.7\textwidth}
\end{minipage}

\hrulefill

\hspace{0.198\textwidth}\vline
\begin{minipage}[t][0.22\textheight][c]{0.7\textwidth}
\end{minipage}

\hrulefill

\hspace{0.198\textwidth}\vline
\begin{minipage}[t][0.22\textheight][c]{0.7\textwidth}
\end{minipage}

\end{document}