fix calendar rendering, also move pgflibrarycalendar.easter.code.tex here

pgflibrarycalendar.easter.def

+% Copyright © 2017
+%	Qrrbrbirlbel
+%
+% Provided that these terms and disclaimer and all copyright notices
+% are retained or reproduced in an accompanying document, permission
+% is granted to deal in this work without restriction, including un‐
+% limited rights to use, publicly perform, distribute, sell, modify,
+% merge, give away, or sublicence.
+%
+% This work is provided “AS IS” and WITHOUT WARRANTY of any kind, to
+% the utmost extent permitted by applicable law, neither express nor
+% implied; without malicious intent or gross negligence. In no event
+% may a licensor, author or contributor be held liable for indirect,
+% direct, other damage, loss, or other issues arising in any way out
+% of dealing in the work, even if advised of the possibility of such
+% damage or existence of a defect, except proven that it results out
+% of said person’s immediate fault when using the work as intended.
+
+% This is made for http://tex.stackexchange.com/a/144186/16595
+% and used the formula from https://de.wikibooks.org/w/index.php?title=Algorithmensammlung:_Kalender:_Feiertage&oldid=670965
+
+\def\pgfcalendar@Easter#1{%
+ \begingroup
+   \count0=#1\relax              % Yeah 0
+   \count1=\count0%              % K 1
+   \divide\count1 100            % K 1
+   \count2=\count1               % M 3
+   \multiply\count2 3
+   \advance\count2 3
+   \divide\count2 4              % 2 holds (3 * K +3) \ 4
+   \count3=\count1
+   \multiply\count3 8
+   \advance\count3 13
+   \divide\count3 -25
+   \advance\count3\count2
+   \advance\count3 15           % M 3
+   \count2-\count2              % S 2
+   \advance\count2 2
+   \count4=\count0              % A 4
+   \divide\count4 19
+   \multiply\count4 -19
+   \advance\count4\count0       % A 4
+   \count1=\count4              % D 1 *
+   \multiply\count1 19
+   \advance\count1\count3
+   \count5\count1
+   \divide\count1 30
+   \multiply\count1 -30
+   \advance\count1\count5       % D 1 *
+   \divide\count4 11            % R 4 *
+   \advance\count4\count1
+   \divide\count4 29            % R 4 *
+   \advance\count1-\count4      % OG 1 **
+   \advance\count1 21           % OG 1 **
+   \count3\count0               % SZ 3 *
+   \divide\count3 4
+   \advance\count3\count0
+   \advance\count3\count2
+   \count4-\count3
+   \divide\count3 7
+   \multiply\count3 7
+   \advance\count3\count4
+   \advance\count3 7           % SZ 3 *
+   \count4-\count3             % OE 4 **
+   \advance\count4\count1
+   \count3-\count4
+   \divide\count4 7
+   \multiply\count4 7
+   \advance\count4\count3
+   \advance\count4 7           % OE 4 **
+   \advance\count4\count1
+   \pgfcalendardatetojulian{\the\count0-03-\the\count4}\pgfutil@tempcnta
+   \expandafter\xdef\csname pgfcalendar@Easter@\the\count0\endcsname
+     {\the\pgfutil@tempcnta}%
+ \endgroup}
+\pgfqkeys{/pgf/calendar/Easter}{
+  .default=0,
+  .code={%
+      \expandafter\ifx\csname pgfcalendar@Easter@\pgfcalendarifdateyear\endcsname\relax
+        \pgfcalendar@Easter{\pgfcalendarifdateyear}%
+      \fi
+      \expandafter\pgfutil@tempcnta
+        \csname pgfcalendar@Easter@\pgfcalendarifdateyear\endcsname
+      \advance\pgfutil@tempcnta#1\relax
+      \ifnum\pgfcalendarifdatejulian=\pgfutil@tempcnta
+        \pgfcalendarmatchestrue
+      \fi}}

teckidscal.sty

 % -*- mode: tex -*-
 %-
-% Copyright © 2016, 2017
+% Copyright © 2016, 2017, 2018
 %	Thorsten Glaser <thorsten.glaser@teckids.org>
 %
 % Provided that these terms and disclaimer and all copyright notices
@@ -21,9 +21,9 @@
 % Teckids e.V. Wandkalender-Utilities
 
 \NeedsTeXFormat{LaTeX2e}%
-\ProvidesPackage{teckidscal}[2017/03/29 1.3 Teckids e.V. Wandkalender-Utilities]%
+\ProvidesPackage{teckidscal}[2018/09/01 1.4 Teckids e.V. Wandkalender-Utilities]%
 \RequirePackage{pgfkeys,pgfcalendar}%
-\input{pgflibrarycalendar.easter.code}%
+\input{pgflibrarycalendar.easter.def}%
 \RequirePackage{etoolbox}%
 \RequirePackage{multirow}%
 \RequirePackage{stringstrings}%
@@ -647,6 +647,7 @@
 
  \vspace{2ex}%
  \linespread{1.42}\selectfont%
+ \color{black}%
 
  Feiertage für Nordrhein-Westfalen; \emph{alle Angaben ohne Gewähr!}
  \dash Fußnoten: \tkFNtext