tikz calendar shrank/compressed to single day

Question

I have a strange error and I have the feeling that the solution is quite obvious...

What I am trying to do is make a simple calendar with tikz. Here is my MWE:

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{calendar}

\begin{document}
\begin{tikzpicture}
    \calendar[dates=2018-10-01 to 2018-10-last];
    \calendar[dates=2018-11-01 to 2018-11-last];
    \calendar[dates=2018-12-01 to 2018-12-last];
    \calendar[dates=2019-01-01 to 2019-01-last];
    \calendar[dates=2019-02-01 to 2019-02-last];
\end{tikzpicture}

\begin{tikzpicture}
    \calendar[dates=2018-10-01 to 2019-02-last];
\end{tikzpicture}
\end{document}

I was trying to arrange the calendar such that I have 3 months per row, but actually I have some very basic problem here, as every day is printed on top of each other. The output looks as shown in the image. I compiled with PDFLaTeX and XeLaTeX (which I prefer) and both give the same results.

What am I missing?

Answer 1

You just forgot to add an option like week list. Having 3 months per row may be achieved with

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{calendar}

\begin{document}
\begin{tikzpicture}
\foreach \X [evaluate=\X as \Y using {int((\X-1)/12)+2018},
evaluate=\X as \PX using {mod(\X-10,3)},
evaluate=\X as \PY using {int((\X-10)/3)}] in {10,...,14}
{
    \calendar at (5*\PX,-5*\PY )[dates=\Y-\X-01 to \Y-\X-last,week list];
}   
\end{tikzpicture}

\begin{tikzpicture}
    \calendar[dates=2018-10-01 to 2019-02-last,week list];
\end{tikzpicture}
\end{document}

Let me stress that I have no idea where the additional 1 comes from. Is is possible that TikZ gets confused when the calendar runs over two years where in the first year February has 29 days and in the next year it does not? Or am I doing something wrong?