Few issues with Tikz Calendar

Question

I have been trying to implement my own agenda since those from the store never really satisfied me. I have now more or less what I wanted to get. I still have minor issues I can't workaround. So if someone has any tips :

1. I display only Monday, Thursday and Friday on the calendar (that appears on each weekly page in the upper right corner). So far the only working solution I have found is a negative "xshift" on days I don't want to display, otherwise, a blank space remains. But for some reason, it works fine except on weeks where the monday beglon to another month than the Thursday and Friday. In that case, a larger blank space is added for some reason, and I don't know why.

2. The calendar displayed on each page do not show the last vertical line whilst it is written in the tabular definition I use for the daytext...

3. The names of the days and the month refuse to translate to french, and I cant figure out why, I paid attention to the usepackage position but still, it does not work.

4. A great icing would be to display a different calendar depending on the week (the value of \n in my code, some calendar if \n is odd, another if \n is even). I don't know how to do that.

A regular week with issues 2 and 3 The ugly week with issue 1 (and 2 and 3 for that matters)

Thanks a lot for any input! Cheers!

My code below :

\documentclass{article}
\usepackage{advdate}
\makeatletter
\renewcommand\AdvanceDate[1][@ne]{\global\advance\day#1 \FixDate}
\makeatother
\usepackage{tgheros,tikz,array}
\usetikzlibrary{calendar}
\usepackage[margin=1.25in,noheadfoot=true]{geometry}
\usepackage[french]{babel}
\usepackage[french]{translator}
%=========================================================
%== Page characteristics (Page Setup) ====================
\setlength{\textwidth}{126mm}
\setlength{\textheight}{230.0mm}
\setlength{\topmargin}{-30mm}
\setlength{\hoffset}{-20mm}
\setlength{\marginparwidth}{-20mm}
\setlength{\footskip}{0mm}
\setlength{\headheight}{11mm}
\setlength{\headsep}{4mm}
\setlength{\parindent}{0cm}
%=========================================================
\usetikzlibrary{backgrounds, positioning, scopes}
\newcommand{\textoverline}[1]{$\overline{\mbox{#1}}$}
\usepackage[absolute,overlay,showboxes]{textpos}
\usepackage{xcolor}
\usepackage{colortbl}
\definecolor{mygrey}{RGB}{239,239,239}
\usepackage{lastpage}
\usepackage{fancyhdr}
\begin{document}
\setlength{\arrayrulewidth}{0.1pt}
\sffamily
\footnotesize
\newcommand\mondaytext[2]{%
  \begin{tabular}{|>{\mdseries\footnotesize}cp{1cm}|cp{1cm}|}
    \multicolumn{2}{c}{#1 #2} \
    \hline
    \begin{tabular}{@{}c@{}}8:35 \ 9:30\end{tabular}& \ \hline
    \begin{tabular}{@{}c@{}}9:30 \ 10:25\end{tabular} & \textbf{4D} \\hline\hline
    \begin{tabular}{@{}c@{}}10:40 \ 11:35\end{tabular} & \textbf{4B}\\hline
    \begin{tabular}{@{}c@{}}11:35 \ 12:30\end{tabular} & \\hline\hline
    \begin{tabular}{@{}c@{}}12:30\ 13:05\end{tabular}  & \\hline\hline
    \begin{tabular}{@{}c@{}}13:05\14:00 \end{tabular}  & \\hline
    \begin{tabular}{@{}c@{}}14:00\14:55 \end{tabular} & \begin{tabular}{@{}c|c@{}}&\textbf{4B}\end{tabular}\\hline\hline
    \begin{tabular}{@{}c@{}}15:10\16:05 \end{tabular}& \textbf{4C}\\hline
  \end{tabular}
}
\newcommand\thursdaytext[2]{%
  \begin{tabular}{|>{\mdseries\footnotesize}cp{1cm}|cp{1cm}|}
    \multicolumn{2}{c}{#1 #2} \
    \hline
    \begin{tabular}{@{}c@{}}8:35 \ 9:30\end{tabular}& \textbf{4D}\ \hline
    \begin{tabular}{@{}c@{}}9:30 \ 10:25\end{tabular} & \textbf{4B}\\hline\hline
    \begin{tabular}{@{}c@{}}10:40 \ 11:35\end{tabular} & \textbf{4C}\\hline
    \begin{tabular}{@{}c@{}}11:35 \ 12:30\end{tabular} & \\hline\hline
    \begin{tabular}{@{}c@{}}12:30\ 13:05\end{tabular}  & \\hline\hline
    \begin{tabular}{@{}c@{}}13:05\14:00 \end{tabular}  & \begin{tabular}{@{}c|c@{}}\textbf{4D}&\end{tabular}\\hline
    \begin{tabular}{@{}c@{}}14:00\14:55 \end{tabular} & \\hline\hline
    \begin{tabular}{@{}c@{}}15:10\16:05 \end{tabular}& \\hline
  \end{tabular}
}
\newcommand\fridaytext[2]{%
  \begin{tabular}{|>{\mdseries\footnotesize}p{1cm}|cp{1cm}|}
    \multicolumn{2}{c}{#1 #2} \
    \hline
    \begin{tabular}{@{}c@{}}8:35 \ 9:30\end{tabular}& \textbf{DF:3C}\ \hline
    \begin{tabular}{@{}c@{}}9:30 \ 10:25\end{tabular} & \textbf{4D} \\hline\hline
    \begin{tabular}{@{}c@{}}10:40 \ 11:35\end{tabular} & \\hline
    \begin{tabular}{@{}c@{}}11:35 \ 12:30\end{tabular} & \\hline\hline
    \begin{tabular}{@{}c@{}}12:30\ 13:05\end{tabular}  & \\hline\hline
    \begin{tabular}{@{}c@{}}13:05\14:00 \end{tabular}  & \begin{tabular}{@{}c|c@{}}& \textbf{4C}\end{tabular} \\hline
    \begin{tabular}{@{}c@{}}14:00\14:55 \end{tabular} & \textbf{4D}\\hline\hline
    \begin{tabular}{@{}c@{}}15:10\16:05 \end{tabular}& \textbf{4C}\\hline
  \end{tabular}
}
\setlength{\skip\footins}{0cm}
\pagestyle{empty}
\SetDate[31/08/2020]
\foreach \n in {1,...,45}{
\begin{textblock}{8}(2,1.25)
\textblockcolour{mygrey!40}
  \vspace{5mm}
    { \qquad \bfseries Notes : }
  \vspace{26mm}
\vspace{25mm}
\end{textblock}
\begin{textblock}{15}(2,14.5)
\textblockcolour{mygrey!40}
  \vspace{2mm}
    { \quad \bfseries Remarques : }
  \vspace{18mm}
\end{textblock}
\enlargethispage{40pt}
\setlength{\arrayrulewidth}{0.5pt}
\arrayrulecolor{black}
\LARGE PLANNING DE LA SEMAINE \n \footnotesize
\begin{tikzpicture}[remember picture, overlay,shift={(5,-3.5)}]
  \calendar (cal)
  [dates=\year-\month-\day to \year-\month-\day+5,day list right,day xshift=3cm,
   execute before day scope=
  {
    \ifdate{Tuesday,Wednesday}{\pgftransformxshift{-3cm}}{}
    },
    day text={},
    execute at begin day scope={
    \ifdate{Monday}{\tikzmonthcode}{}},
    set style={{every month}+=[anchor=base east,font=\bfseries\large,xshift=-2.5em,yshift=12em]},
%  execute after day scope={\ifdate{Sunday}{\pgftransformyshift{-30em},\pgftransformxshift{-10.1cm}}{}}
  ]
  if(Monday) [day text={\mondaytext{%wt}{%d0}}]
  if(Thursday) [day text={\thursdaytext{%wt}{%d0}}]
  if(Friday) [day text={\fridaytext{%wt}{%d0}}]

  if (weekend) [font=\bfseries]
  if (Sunday) [red];
%  \node[above right,font=\bfseries\footnotesize] at (cal-2020-09-14.north west)
%    {14--18 Septembre 2020};
\end{tikzpicture}
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\
\setlength{\arrayrulewidth}{0.1pt}
\arrayrulecolor{black!60}
\begin{tabular}{p{19cm}}
\textbf{LUNDI :} \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\
\textbf{JEUDI :} \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\
\textbf{VENDREDI :} \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline \
\hline 
\end{tabular}
\AdvanceDate[7]
\newpage
}
\end{document}