Arrange node next to calendar

Question

I want to arrange text next to a calendar created by TikZ. Is there a way to use relative placement (section 3.8 of the manual) or something similar?

For example, I want to place "Text 2" below of "Text 1" (and still in the correct calendar row).

My MWE:

\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{calendar}
\begin{document}
\begin{tikzpicture}[every day/.style={anchor=center}]
\calendar[dates=2000-01-01 to 2000-01-last,
          week list]
          if (equals=2000-01-03) {\draw (0,0) circle (7.5pt); \node [right=5cm] {Text 1};}
          if (equals=2000-01-11) {\draw (0,0) circle (7.5pt); \node [right=5cm] {Text 2};}
          if (equals=2000-01-16) {\draw (0,0) circle (7.5pt); \node [right=5cm] {Text 3};}
          ;
\end{tikzpicture}
\end{document}

Current output:

Answer 1

There could be better or other ways of doing this - I do not know calendar well enough.

\documentclass[tikz, border=1cm]{standalone} 
\usetikzlibrary{calendar}
\begin{document}
\begin{tikzpicture}[every day/.style={anchor=center}]
\coordinate (col1) at (5,0);
\coordinate (col2) at (6.5,0);
\calendar[dates=2000-01-01 to 2000-01-last,
week list]
if (equals=2000-01-03) {\draw (0,0) circle (7.5pt); \node at (col1|-0,0) {Text 1};}
if (equals=2000-01-11) {\draw (0,0) circle (7.5pt); \node at (col1|-0,0) {Text 2};}
if (equals=2000-01-16) {\draw (0,0) circle (7.5pt); \node at (col2|-0,0) {Text 3};}
;
\end{tikzpicture}
\end{document}

Edit: First node is named and the next nodes are placed relative to that. -same output.

\documentclass[tikz, border=1cm]{standalone} 
\usetikzlibrary{calendar}
\begin{document}
\begin{tikzpicture}[every day/.style={anchor=center}]
\calendar[dates=2000-01-01 to 2000-01-last,
week list]
if (equals=2000-01-03) {\draw (0,0) circle (7.5pt); \node[right=5cm] (A) {Text 1};}
if (equals=2000-01-11) {\draw (0,0) circle (7.5pt); \node at (A|-0,0) {Text 2};}
if (equals=2000-01-16) {\draw (0,0) circle (7.5pt); \node at ([xshift=1.5cm]A|-0,0) {Text 3};}
;
\end{tikzpicture}
\end{document}

Edit: With different length text and left adjusted:

\documentclass[tikz, border=1cm]{standalone} 
\usetikzlibrary{calendar}
\begin{document}
\begin{tikzpicture}[every node/.style={anchor=base west}, every day/.style={anchor=center}]
\calendar[dates=2000-01-01 to 2000-01-last,
week list]
if (equals=2000-01-03) {\draw (0,0) circle (7.5pt); \node[right=4cm] (A) {Text 1};}
if (equals=2000-01-11) {\draw (0,0) circle (7.5pt); \node at (A.west|-0,-0.1) {A very long Text 2};}
if (equals=2000-01-16) {\draw (0,0) circle (7.5pt); \node at ([xshift=3cm]A|-0,-0.1) {Text 3};}
;
\end{tikzpicture}
\end{document}

Answer 2

The idea is to toggle a boolean when the first node per week has been placed.

If it has, we place the next label in relation to the previous node (and name it the same so that a possible third label will be placed further to the right).

If not, we place it in relation to the current weekday (Monday = 0, Sunday = 6).

Using the base anchor for the days makes it easier to place the extra nodes. Though, we could also just do the placement of the first extra node relative to any anchor of the days nodes. (Though, since the origin is already at that anchor, it is not necessary in this simple calendar style.)

---

We could also check for the existence of a node but we would need to unexist it after the Sunday (just as with the toggle) or define those on a week per week basis (either through a global counter or the week number itself) but these gets interesting (and wasteful?) if you have more than one calendar in your document.

The toggle seems to be the most straight-forward one.

Code

\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{calendar}
\newif\iftikzCalLabelPlacedThisWeek
\makeatletter
\newcommand*\tikzCalDayXshift{\tikz@lib@cal@xshift}
\pgfkeys{/utils/TeX/IF/.code n args={3}{\csname if#1\endcsname
  \expandafter\pgfutil@firstoftwo\else\expandafter\pgfutil@secondoftwo\fi
    {\pgfkeysalso{#2}}{\pgfkeysalso{#3}}}}
\makeatother
\tikzset{
  % needs to be global because "if" will be executed inside group
  % could also check for existence of a node on a week for week basis
  % but that needs more overhead when multiple calendars will be typeset.
  cal label node placed/.code={\global\tikzCalLabelPlacedThisWeektrue},
  cal label node/.style={
    name=cal-thisweek, % for reference for next cal label
    anchor=base west,
    /utils/TeX/IF={tikzCalLabelPlacedThisWeek}{
      % we've already placed one cal label? place the next one next to it
      xshift=1mm, at=(cal-thisweek.base east)
    }{ % first cal label this week: off set weekday shifting
      at={({(7-\pgfcalendarcurrentweekday)*\tikzCalDayXshift},0)}
      % at={([xshift=(7-\pgfcalendarcurrentweekday)*\tikzCalDayXshift]\tikzlastnode.base)}
    },
    cal label node placed},
  cal label/.style={
    days={
      append after command={
        (\tikzlastnode.center) edge[to path={circle[radius=7.5pt]}, draw]()
        node[cal label node]{#1}}}},
  week list with cal labels/.style={
    week list,
    % initialize false in case we've had same cal in document before
    /utils/exec=\tikzCalLabelPlacedThisWeekfalse,
    %  doesn't need to be global because we're not inside the day group
    execute after day scope=\ifdate{Sunday}{\tikzCalLabelPlacedThisWeekfalse}{}}}
\begin{document}
\begin{tikzpicture}[every day/.style={anchor=base}]
\calendar[dates=2000-01-01 to 2000-01-last,
          week list with cal labels]
          if (equals=2000-01-03) [cal label=Text 1]
          if (equals=2000-01-11) [cal label=A very long Text 2]
          if (equals=2000-01-16) [cal label=Text 3]
          ;
\end{tikzpicture}
\end{document}

Output