I would prefer to have the calendar by Hakon Malmedal from http://www.texample.net/tikz/examples/birthday-calendar/ in 5 rows, as shown in the attached image. The approach I use is to declare:
%% ----- Move 6th week to the 1st week line -----
\makeatletter
\tikzstyle{week move}=[
execute before day scope={
\ifdate{day of month=30}{
\pgfmathsetlength{\pgf@y}{\tikz@lib@cal@yshift}
\pgftransformyshift{5\pgf@y}
}{}
}
]
\makeatother
And call it on calendar creation:
\calendar[dates=2017-01-01 to 2017-01-last,
week list,
week move,......
The problem I see is of how to detect when the sixth row (containing Jan. 30 and 31 for Jan. 2017) starts. I use /ifdate, but this is of course not the right way, as it needs to be changed according the month.
Here is what I try to achieve: 
Thanks for your help!
------------ Full code, as requested --------------
% Birthday calendar
% Author: Hakon Malmedal
\documentclass[fontsize=20pt]{scrartcl}
\usepackage[english]{babel}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage[margin=1cm,a4paper,landscape]{geometry}
\pagestyle{empty}
\usepackage{graphicx}
\usepackage{tikz}
%%%<
\usepackage{verbatim}
%%%>
\begin{comment}
:Title: Birthday calendar
:Tags: Calendar library;Calendars
:Author: Hakon Malmedal
:Slug: birthday-calendar
\end{comment}
\usetikzlibrary{calendar,fit}
\usepackage{expl3,xparse}
%% Adapted from http://tex.stackexchange.com/a/10199/4771
\makeatletter%
\tikzoption{day headings}{\tikzstyle{day heading}=[#1]}
\tikzstyle{day heading}=[]
\tikzstyle{day letter headings}=[
execute before day scope={ \ifdate{day of month=1}{%
\pgfmathsetlength{\pgf@ya}{\tikz@lib@cal@yshift}%
\pgfmathsetlength\pgf@xa{\tikz@lib@cal@xshift}%
\pgftransformyshift{-\pgf@ya}
\foreach \d/\l in {0/Mandag,1/Tirsdag,2/Onsdag,3/Torsdag,%
4/Fredag,5/Lørdag,6/Søndag} {
\pgf@xa=\d\pgf@xa%
\pgftransformxshift{\pgf@xa-\cellwidth/2}%
\pgftransformyshift{\pgf@ya}%
\node[above=-0.5ex,day heading]{\l};%
}
}{}%
}%
]
\makeatother%
%% End
%% -------- Move 6th week to the 1st week line ---
\makeatletter
\tikzstyle{week move}=[
execute before day scope={
\ifdate{day of month=30}{
\pgfmathsetlength{\pgf@y}{\tikz@lib@cal@yshift}
\pgftransformyshift{5\pgf@y}
}{}
}
]
\makeatother
%% Adapted from pgf source
\def\pgfcalendarmonthname#1{%
\translate{\ifcase#1\or Januar\or Februar\or Mars\or April\or
Mai\or Juni\or Juli\or August\or September\or Oktober\or
November\or Desember\fi}%
}
\makeatletter
\tikzstyle{month label above centered}=[%
execute before day scope={%
\ifdate{day of month=1}{%
{
\pgfmathsetlength{\pgf@xa}{\tikz@lib@cal@xshift}%
\pgf@xb=\tikz@lib@cal@width\pgf@xa%
\advance\pgf@xb by-\pgf@xa%
\pgf@xb=.5\pgf@xb%
\pgftransformxshift{\pgf@xb}%
\pgftransformxshift{-\cellwidth/2}%
\pgfmathsetlength{\pgf@y}{\tikz@lib@cal@yshift}%
\pgftransformyshift{0.333\pgf@y}
\tikzmonthcode%
}
}{}},
every month/.append style={anchor=base}
]
\makeatother
%% End
\ExplSyntaxOn
%% Adapted from http://tex.stackexchange.com/a/56214/4771
%%
% first of all we define the user level commands
\NewDocumentCommand{\addtext}{ m }{ \bdaycal_input_add:n { #1 } }
\NewDocumentCommand{\addtextyear}{ mm }{ \bdaycal_input_add_y:nn { #1 } { #2 } }
\NewDocumentCommand{\showtext}{ }{ \bdaycal_output_direct: }
% allocate variable:
% a sequence for global storage of the inputs;
\seq_new:N \g_bdaycal_input_seq
% store globally an input in the sequence
\cs_new:Npn \bdaycal_input_add:n #1
{
\seq_gput_right:Nn \g_bdaycal_input_seq { #1 }
}
\cs_new:Npn \bdaycal_input_add_y:nn #1 #2
{
\seq_gput_right:Nn \g_bdaycal_input_seq { #1 ~ ( \int_to_arabic:n
{ \pgfcalendarifdateyear - #2 } ) }
}
% how to output in direct order; we simply do a mapping function calling
% \bdaycal_print:n after incrementing the counter
\cs_new_protected:Npn \bdaycal_output_direct:
{
\seq_map_inline:Nn \g_bdaycal_input_seq
{
\bdaycal_print:n { ##1 }
}
\seq_gclear:N \g_bdaycal_input_seq
}
% the printing macro; change here for adapting to your wishes
\cs_new:Npn \bdaycal_print:n #1
{
#1 \par
}
%% End
%% Knuth's AoCP, vol 1, 2nd ed, pp 155--156
\int_new:N \l_easter_Y_int
\int_new:N \l_easter_G_int
\int_new:N \l_easter_C_int
\int_new:N \l_easter_X_int
\int_new:N \l_easter_Z_int
\int_new:N \l_easter_D_int
\int_new:N \l_easter_E_int
\int_new:N \l_easter_N_int
\int_new:N \l_easter_M_int
\int_new:N \l_easter_julian_day_int
\cs_new:Nn \easter_sunday:n {
\int_set:Nn \l_easter_Y_int { #1 }
\int_set:Nn \l_easter_G_int {
\int_mod:nn { \l_easter_Y_int } { 19 } + 1
}
\int_set:Nn \l_easter_C_int {
\int_div_truncate:nn { \l_easter_Y_int } { 100 } + 1
}
\int_set:Nn \l_easter_X_int {
\int_div_truncate:nn { 3 * \l_easter_C_int } { 4 } - 12
}
\int_set:Nn \l_easter_Z_int {
\int_div_truncate:nn { 8 * \l_easter_C_int + 5 } { 25 } - 5
}
\int_set:Nn \l_easter_D_int {
\int_div_truncate:nn { 5 * \l_easter_Y_int } { 4 } - \l_easter_X_int - 10
}
\int_set:Nn \l_easter_E_int {
\int_mod:nn { 11 * \l_easter_G_int + 20 + \l_easter_Z_int
- \l_easter_X_int } { 30 }
}
% \int_mod:nn behaves strangely.
\int_compare:nNnT { \l_easter_E_int } < { 0 }
{
\int_add:Nn \l_easter_E_int { 30 }
}
\int_compare:nNnTF { \l_easter_E_int } = { 25 }
{ % true
\int_compare:nNnT { \l_easter_G_int } > { 11 }
{ % true
\int_incr:N \l_easter_E_int
}
}
{ % false
\int_compare:nNnT { \l_easter_E_int } = { 24 }
{ % true
\int_incr:N \l_easter_E_int
}
}
\int_set:Nn \l_easter_N_int { 44 - \l_easter_E_int }
\int_compare:nNnT { \l_easter_N_int } < { 21 }
{ % true
\int_add:Nn \l_easter_N_int { 30 }
}
\int_add:Nn \l_easter_N_int {
7 - \int_mod:nn { \l_easter_D_int + \l_easter_N_int } { 7 }
}
\int_compare:nNnTF { \l_easter_N_int } > { 31 }
{ % true
\int_sub:Nn \l_easter_N_int { 31 }
\int_set:Nn \l_easter_M_int { 4 } % April
}
{ % false
\int_set:Nn \l_easter_M_int { 3 } % March
}
\pgfcalendardatetojulian { \l_easter_Y_int -
\l_easter_M_int - \l_easter_N_int
} { \l_easter_julian_day_int }
}
\pgfkeys{/pgf/calendar/Easter/.default = 0}
\pgfkeys{/pgf/calendar/Easter/.code =
{
\easter_sunday:n { \pgfcalendarifdateyear }
\int_compare:nNnT { \pgfcalendarifdatejulian }
= {\l_easter_julian_day_int + #1}
{ \pgfcalendarmatchestrue }
}
}
\int_new:N \l_advent_Y_int
\int_new:N \l_advent_xmas_julian_day_int
\int_new:N \l_advent_xmas_week_day_int
\int_new:N \l_advent_julian_day_int
\cs_new:Nn \advent_sunday:n {
\int_set:Nn \l_advent_Y_int { #1 }
\pgfcalendardatetojulian { \l_advent_Y_int - 12 - 25 } {
\l_advent_xmas_julian_day_int }
\pgfcalendarjuliantoweekday { \l_advent_xmas_julian_day_int } {
\l_advent_xmas_week_day_int }
\int_set:Nn \l_advent_julian_day_int {
\l_advent_xmas_julian_day_int - \l_advent_xmas_week_day_int - 22 }
}
\pgfkeys{/pgf/calendar/Advent/.default = 0}
\pgfkeys{/pgf/calendar/Advent/.code =
{
\advent_sunday:n { \pgfcalendarifdateyear }
\int_compare:nNnT { \pgfcalendarifdatejulian }
= {\l_advent_julian_day_int + #1}
{ \pgfcalendarmatchestrue }
}
}
%% http://www.tondering.dk/claus/cal/week.php#calcweekno
\int_new:N \l_week_number_year_int
\int_new:N \l_week_number_month_int
\int_new:N \l_week_number_day_int
\int_new:N \l_week_number_a_int
\int_new:N \l_week_number_b_int
\int_new:N \l_week_number_c_int
\int_new:N \l_week_number_s_int
\int_new:N \l_week_number_e_int
\int_new:N \l_week_number_f_int
\int_new:N \l_week_number_g_int
\int_new:N \l_week_number_d_int
\int_new:N \l_week_number_n_int
\int_new:N \l_week_number_W_int
\cs_new:Nn \week_number:nnn {
\int_set:Nn \l_week_number_year_int { #1 }
\int_set:Nn \l_week_number_month_int { #2 }
\int_set:Nn \l_week_number_day_int { #3 }
\int_compare:nNnTF { \l_week_number_month_int } < { 3 } % jan or feb
{ % true
\int_set:Nn \l_week_number_a_int { \l_week_number_year_int - 1 }
\int_set:Nn \l_week_number_b_int {
\int_div_truncate:nn { \l_week_number_a_int } { 4 }
- \int_div_truncate:nn { \l_week_number_a_int } { 100 }
+ \int_div_truncate:nn { \l_week_number_a_int } { 400 }
}
\int_set:Nn \l_week_number_c_int {
\int_div_truncate:nn { \l_week_number_a_int - 1 } { 4 }
- \int_div_truncate:nn { \l_week_number_a_int - 1 } { 100 }
+ \int_div_truncate:nn { \l_week_number_a_int - 1 } { 400 }
}
\int_set:Nn \l_week_number_s_int {
\l_week_number_b_int - \l_week_number_c_int }
\int_zero:N \l_week_number_e_int
\int_set:Nn \l_week_number_f_int { \l_week_number_day_int - 1
+ 31 * ( \l_week_number_month_int - 1 ) }
} % end true
{ % false
\int_set_eq:NN \l_week_number_a_int \l_week_number_year_int
\int_set:Nn \l_week_number_b_int {
\int_div_truncate:nn { \l_week_number_a_int } { 4 }
- \int_div_truncate:nn { \l_week_number_a_int } { 100 }
+ \int_div_truncate:nn { \l_week_number_a_int } { 400 }
}
\int_set:Nn \l_week_number_c_int {
\int_div_truncate:nn { \l_week_number_a_int - 1 } { 4 }
- \int_div_truncate:nn { \l_week_number_a_int - 1 } { 100 }
+ \int_div_truncate:nn { \l_week_number_a_int - 1 } { 400 }
}
\int_set:Nn \l_week_number_s_int {
\l_week_number_b_int - \l_week_number_c_int }
\int_set:Nn \l_week_number_e_int { \l_week_number_s_int + 1 }
\int_set:Nn \l_week_number_f_int { \l_week_number_day_int
+ \int_div_truncate:nn {
153 * ( \l_week_number_month_int - 3 ) + 2 } { 5 }
+ 58 + \l_week_number_s_int }
} % end false
\int_set:Nn \l_week_number_g_int {
\int_mod:nn { \l_week_number_a_int + \l_week_number_b_int } { 7 } }
\int_set:Nn \l_week_number_d_int {
\int_mod:nn { \l_week_number_f_int + \l_week_number_g_int
- \l_week_number_e_int } { 7 } }
\int_set:Nn \l_week_number_n_int {
\l_week_number_f_int + 3 - \l_week_number_d_int }
\int_compare:nNnTF { \l_week_number_n_int } < { 0 }
{ %true
\int_set:Nn \l_week_number_W_int { 53
- \int_div_truncate:nn { \l_week_number_g_int
- \l_week_number_s_int } { 5 } }
} % end true
{ % false
\int_compare:nNnTF { \l_week_number_n_int } > { 364
+ \l_week_number_s_int }
{ % true
\int_set:Nn \l_week_number_W_int { 1 }
} % end true
{ % false
\int_set:Nn \l_week_number_W_int { \int_div_truncate:nn {
\l_week_number_n_int } { 7 } + 1 }
} % end false
} % end false
}
\definecolor{roed}{rgb}{0.937254901961,0.16862745098,0.176470588235}
\definecolor{blaa}{rgb}{0,0.156862745098,0.407843137255}
\newsavebox{\flagNO}
\savebox{\flagNO}{
\begin{tikzpicture}
\fill[roed] rectangle (6pt,6pt);
\fill[roed,yshift=10pt] rectangle (6pt,6pt);
\fill[roed,xshift=10pt] rectangle (12pt,6pt);
\fill[roed,xshift=10pt,yshift=10pt] rectangle (12pt,6pt);
\fill[blaa,yshift=7pt] rectangle (22pt,2pt);
\fill[blaa,xshift=7pt] rectangle (2pt,16pt);
\end{tikzpicture}
}
\pgfkeys{/tikz/week~number/.code =
{
\week_number:nnn {
\pgfcalendarifdateyear } {
\pgfcalendarifdatemonth } {
\pgfcalendarifdateday }
\addtext{ Uke ~ \int_to_arabic:n { \l_week_number_W_int } }
}
}
\ExplSyntaxOff
\pgfkeys{/tikz/flag-flying day/.code =
{
\draw (-\cellwidth,0) node [above right,font=\Huge]
{\resizebox{!}{0.8ex}{\usebox{\flagNO}}};
}
}
\pgfkeys{/tikz/observance/.code =
{
\addtext{#1}
}
}
\pgfkeys{/tikz/anniversary/.code 2 args=\addtextyear{#1}{#2}}
\pgfkeys{/tikz/day code =
{
\node (lower right) at (0,0) [above left,font=\Huge] {\tikzdaytext};
\node (upper left) at (-\cellwidth,\cellheight)
[below right,align=left,text width=\cellwidth-\pgflinewidth,
font=\tiny,black] {\showtext};
\node (lower left) at (-\cellwidth,0) {};
\node[rounded corners, draw,
fit=(lower right) (upper left) (lower left),
inner sep=1mm] {};
}
}
\pgfkeys{/tikz/inner sep = 0pt}
\pgfkeys{/tikz/day xshift=\cellwidth+2mm+2mm}
\pgfkeys{/tikz/day yshift=\cellheight+2mm+2mm}
\newlength{\cellheight}
\setlength{\cellheight}{28mm}
\newlength{\cellwidth}
\setlength{\cellwidth}{35mm}
\begin{document}
\centering
\begin{tikzpicture}[thick]
\calendar[dates=2017-01-01 to 2017-01-last,
week list,
week move,
month label above centered,
month text=\textsc{\%mt \%y0},
day headings={font=\footnotesize},
day letter headings]
if (Monday,
equals=01-01,
equals=02-01,
equals=03-01,
equals=04-01,
equals=05-01,
equals=06-01,
equals=07-01,
equals=08-01,
equals=09-01,
equals=10-01,
equals=11-01,
equals=12-01) [week number]
if (Sunday,
Easter=-3, % Maundy Thursday
Easter=-2, % Good Friday
Easter, % Easter Sunday
Easter=1, % Easter Monday
Easter=39, % Feast of the Ascension
Easter=49, % Pentecost
Easter=50, % Whit Monday
equals=01-01,
equals=05-01,
equals=05-17,
equals=12-25,
equals=12-26) [red]
if (equals=01-01,
equals=01-21,
equals=02-06,
equals=02-21,
equals=05-01,
equals=05-08,
equals=05-17,
equals=06-07,
equals=07-04,
equals=07-20,
equals=07-29,
equals=08-19,
equals=12-25,
Easter,
Easter=49) [flag-flying day]
if (equals=01-01) [observance=Første nyttårsdag]
if (equals=01-21) [observance=Prinsesse Ingrid Alexandra]
if (equals=02-06) [observance=Samefolkets dag]
if (equals=02-21) [observance=Kong Harald~V]
if (equals=05-01) [observance=Offentlig høytidsdag]
if (equals=05-08) [observance=Frigjøringsdagen]
if (equals=05-17) [observance=Grunnlovsdag]
if (equals=06-07) [observance=Unionsoppløsningen]
if (equals=06-23) [observance=Sankthansaften]
if (equals=07-04) [observance=Dronning Sonja]
if (equals=07-20) [observance=Kronprins Haakon]
if (equals=07-29) [observance=Olsok]
if (equals=08-19) [observance=Kronprinsesse Mette-Marit]
if (equals=10-24) [observance=FN-dagen]
if (equals=12-25) [observance=Første juledag]
if (equals=12-26) [observance=Andre juledag]
if (Easter=-49) [observance=Fastelavnssøndag]
if (Easter=-7) [observance=Palmesøndag]
if (Easter=-3) [observance=Skjærtorsdag]
if (Easter=-2) [observance=Langfredag]
if (Easter) [observance=Første påskedag]
if (Easter=1) [observance=Andre påskedag]
if (Easter=39) [observance=Kristi himmelfartsdag]
if (Easter=49) [observance=Første pinsedag]
if (Easter=50) [observance=Andre pinsedag]
if (Advent) [observance=Advent]
if (equals=05-07) [anniversary={Brahms}{1833}]
;
\end{tikzpicture}
\end{document}
