Insert a wide box to write

Question

I have this tikz display and I want to make something like a minipage to write thing on each day. I'm not a master of tikz.

\documentclass[a5paper]{article}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage{tikz}
\usetikzlibrary{positioning, calendar, shapes.misc}
\usepackage[margin=0.5cm]{geometry}
\begin{document}
\begin{tikzpicture}[%
        inner sep=3 pt,
        dayname/.style={%
            node font=\footnotesize, 
        },
        daynumber/.style={%
            anchor=north east,
            node font=\normalsize\bfseries, 
        },
        activitie/.style={%
            anchor=north east,
            node font=\normalsize, 
        },
        xscale = 10,
        yscale=-3
    ]
\node (saturday_number) at (-0.1,6) [daynumber] {14};
\node [base right = 1em of saturday_number, anchor=base west] [dayname] {Sábado};

\node (sunday_number) at (0.45,6) [daynumber] {15};
\node [base right = 1em of sunday_number, anchor=base west] [dayname] {Domingo};
\draw (-0.25,7) -- (0.99,7);

\node (friday_number) at (-0.1,5) [daynumber] {13};
\node [base right = 1em of friday_number, anchor=base west] [dayname] {Viernes};
\draw (-0.25,6) -- (0.99,6);

\node (thursday_number) at (-0.1,4) [daynumber] {12};
\node [base right = 1em of thursday_number, anchor=base west] [dayname] {Jueves};
\draw (-0.25,5) -- (0.99,5);

\node (wednesday_number) at (-0.1,3) [daynumber] {11};
\node [base right = 1em of wednesday_number, anchor=base west] [dayname] {Miércoles};
\draw (-0.25,4) -- (0.99,4);

\node (tuesday_number) at (-0.1,2) [daynumber] {10};
\node [base right = 1em of tuesday_number, anchor=base west] [dayname] {Martes};
\draw (-0.25,3) -- (0.99,3);

\node (monday_number) at (-0.1,1) [daynumber] {9};
\node [base right = 1em of monday_number, anchor=base west] [dayname] {Lunes};
\draw (-0.25,2) -- (0.99,2);

\node (year_number) at (-0.15,1) [anchor = south east, minimum height = 2em] {2022};
\node [base right = 1em of year_number, anchor=base west, node font=\large] {Diciembre};
\draw (-0.25,1) -- (0.99,1);


\end{tikzpicture}
\end{document}

Thanks for reading