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diff --git a/macros/latex/contrib/datetime2-contrib/datetime2-greek/README b/macros/latex/contrib/datetime2-contrib/datetime2-greek/README
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+Greek Language Module for datetime2 Package
+
+Author: Nicola L. C. Talbot (inactive)
+
+Licence: LPPL
+
+Required Packages: datetime2, tracklang
+
+This module is unmaintained. If you want to volunteer to take over
+the maintenance contact me at www.dickimaw-books.com/contact.html
+
+Example usage:
+
+\documentclass{article}
+\usepackage[greek]{datetime2}
+\begin{document}
+\today
+\end{document}
+
+\documentclass[greek]{article}
+\usepackage{babel}
+\usepackage[useregional]{datetime2}
+\begin{document}
+\today
+\end{document}
+
+\documentclass{article}
+\usepackage{polyglossia}
+\setmainlanguage{greek}
+\usepackage[greek]{datetime2}
+\begin{document}
+\today
+\end{document}
+
+INSTALLATION
+============
+
+xelatex datetime2-greek.ins
+
+Move all *.ldf files to
+TEXMF/tex/latex/datetime2-contrib/datetime2-greek/
+
+Documentation:
+
+xelatex datetime2-greek.dtx
+makeindex -s gind.ist datetime2-greek.idx
+makeindex -s gglo.ist -o datetime2-greek.gls datetime2-greek.glo
+xelatex datetime2-greek.dtx
+xelatex datetime2-greek.dtx
+
+Move datetime2-greek.pdf and README to
+TEXMF/doc/latex/datetime2-contrib/datetime2-greek/
+
+This material is subject to the LaTeX Project Public License.
+See http://www.ctan.org/license/lppl1.3 for the details of that
+license.
+
diff --git a/macros/latex/contrib/datetime2-contrib/datetime2-greek/datetime2-greek.dtx b/macros/latex/contrib/datetime2-contrib/datetime2-greek/datetime2-greek.dtx
new file mode 100644
index 0000000000..d3d6dd085a
--- /dev/null
+++ b/macros/latex/contrib/datetime2-contrib/datetime2-greek/datetime2-greek.dtx
@@ -0,0 +1,539 @@
+%\iffalse
+%<*package>
+%% \CharacterTable
+%%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
+%%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
+%%   Digits        \0\1\2\3\4\5\6\7\8\9
+%%   Exclamation   \!     Double quote  \"     Hash (number) \#
+%%   Dollar        \$     Percent       \%     Ampersand     \&
+%%   Acute accent  \'     Left paren    \(     Right paren   \)
+%%   Asterisk      \*     Plus          \+     Comma         \,
+%%   Minus         \-     Point         \.     Solidus       \/
+%%   Colon         \:     Semicolon     \;     Less than     \<
+%%   Equals        \=     Greater than  \>     Question mark \?
+%%   Commercial at \@     Left bracket  \[     Backslash     \\
+%%   Right bracket \]     Circumflex    \^     Underscore    \_
+%%   Grave accent  \`     Left brace    \{     Vertical bar  \|
+%%   Right brace   \}     Tilde         \~}
+%</package>
+%\fi
+% \iffalse
+% Doc-Source file to use with LaTeX2e
+% Copyright (C) 2018 Nicola Talbot, all rights reserved.
+% (New maintainer add relevant lines here.)
+% \fi
+% \iffalse
+%<*driver>
+\documentclass{ltxdoc}
+
+\usepackage{alltt}
+\usepackage{graphicx}
+\usepackage{fontspec}
+\usepackage[colorlinks,
+            bookmarks,
+            hyperindex=false,
+            pdfauthor={Nicola L.C. Talbot},
+            pdftitle={datetime2.sty Greek Module}]{hyperref}
+
+\newfontfamily\greekfont{Liberation Serif}
+\setmonofont{Liberation Mono}
+
+\CheckSum{230}
+
+\renewcommand*{\usage}[1]{\hyperpage{#1}}
+\renewcommand*{\main}[1]{\hyperpage{#1}}
+\IndexPrologue{\section*{\indexname}\markboth{\indexname}{\indexname}}
+\setcounter{IndexColumns}{2}
+
+\newcommand*{\sty}[1]{\textsf{#1}}
+\newcommand*{\opt}[1]{\texttt{#1}\index{#1=\texttt{#1}|main}}
+
+\RecordChanges
+\PageIndex
+\CodelineNumbered
+
+\begin{document}
+\DocInput{datetime2-greek.dtx}
+\end{document}
+%</driver>
+%\fi
+%
+%\MakeShortVerb{"}
+%
+%\title{Greek Module for datetime2 Package}
+%\author{Nicola L. C. Talbot (inactive)}
+%\date{2018-04-18 (v1.1)}
+%\maketitle
+%
+%This module is currently unmaintained and may be subject to change.
+%If you want to volunteer to take over maintanance, contact me at
+%\url{http://www.dickimaw-books.com/contact.html}
+%
+%\begin{abstract}
+%This is the Greek language module for the \sty{datetime2}
+%package. If you want to use the settings in this module you must
+%install it in addition to installing \sty{datetime2}. If you use
+%\sty{babel} or \sty{polyglossia}, you will need this module to
+%prevent them from redefining \cs{today}. The \sty{datetime2}
+% \opt{useregional} setting must be set to "text" or "numeric"
+% for the language styles to be set.
+% Alternatively, you can set the style in the document using
+% \cs{DTMsetstyle}, but this may be changed by \cs{date}\meta{language}
+% depending on the value of the \opt{useregional} setting.
+%\end{abstract}
+%
+%I've copied the date style from \texttt{babel-greek}'s \cs{today}.
+%
+%I don't know if these settings are correct as I can't speak Greek.
+%In particular, I don't know if the "greek" time style is
+%correct. Currently this just uses the "default" time style. Please
+%be aware that this may change. Whoever takes over maintanance
+%of this module may can change it as appropriate.
+%
+%The new maintainer should add the line:
+%\begin{verbatim}
+% The Current Maintainer of this work is Name.
+%\end{verbatim}
+%to the preamble part in \texttt{datetime2-greek.ins} where Name
+%is the name of the maintainer(s) and replace
+%the `inactive' status to `maintained'.
+%
+%Currently there is only a regionless style. There is currently no
+%support for Ancient Greek.
+%
+%\StopEventually{%
+%\clearpage
+%\phantomsection
+%\addcontentsline{toc}{section}{Change History}%
+%\PrintChanges
+%\addcontentsline{toc}{section}{\indexname}%
+%\PrintIndex}
+%\section{The Code}
+%\iffalse
+%    \begin{macrocode}
+%<*datetime2-greek-utf8.ldf>
+%    \end{macrocode}
+%\fi
+%\subsection{UTF-8}
+%This file contains the settings that use UTF-8 characters. This
+%file is loaded if XeLaTeX or LuaLaTeX are used. Please make sure
+%your text editor is set to UTF-8 if you want to view this code.
+%\changes{1.0}{2015-03-30}{Initial release}
+% Identify module
+%    \begin{macrocode}
+\ProvidesDateTimeModule{greek-utf8}[2018/04/18 v1.1]
+%    \end{macrocode}
+%\begin{macro}{\DTMgreekordinal}
+%    \begin{macrocode}
+\newcommand*{\DTMgreekordinal}[1]{%
+  \number#1
+}
+%    \end{macrocode}
+%\end{macro}
+%
+%
+%\begin{macro}{\DTMgreekmonthname}
+% Greek month names.
+%    \begin{macrocode}
+\newcommand*{\DTMgreekmonthname}[1]{%
+  \ifcase#1
+  \or
+  Ιανουαρίου%
+  \or
+  Φεβρουαρίου%
+  \or
+  Μαρτίου%
+  \or
+  Απριλίου%
+  \or
+  Μαΐου%
+  \or
+  Ιουνίου%
+  \or
+  Ιουλίου%
+  \or
+  Αυγούστου%
+  \or
+  Σεπτεμβρίου%
+  \or
+  Οκτωβρίου%
+  \or
+  Νοεμβρίου%
+  \or
+  Δεκεμβρίου%
+  \fi
+}
+%    \end{macrocode}
+%\end{macro}
+%
+%
+%If abbreviated dates are supported, short month names should be
+%likewise provided.
+%
+%\iffalse
+%    \begin{macrocode}
+%</datetime2-greek-utf8.ldf>
+%    \end{macrocode}
+%\fi
+%\iffalse
+%    \begin{macrocode}
+%<*datetime2-greek-ascii.ldf>
+%    \end{macrocode}
+%\fi
+%\subsection{ASCII}
+%This file contains the settings that use \LaTeX\ commands for
+%non-ASCII characters. This should be input if neither XeLaTeX nor
+%LuaLaTeX are used. Even if the user has loaded \sty{inputenc} with
+%"utf8", this file should still be used not the
+%\texttt{datetime2-greek-utf8.ldf} file as the non-ASCII
+%characters are made active in that situation and would need
+%protecting against expansion.
+%\changes{1.0}{2015-03-30}{Initial release}
+% Identify module
+%    \begin{macrocode}
+\ProvidesDateTimeModule{greek-ascii}[2018/04/18 v1.1]
+%    \end{macrocode}
+%
+%If abbreviated dates are supported, short month names should be
+%likewise provided.
+%\begin{macro}{\DTMgreekordinal}
+%    \begin{macrocode}
+\newcommand*{\DTMgreekordinal}[1]{%
+  \number#1
+}
+%    \end{macrocode}
+%\end{macro}
+%
+%\begin{macro}{\DTMgreekmonthname}
+% Greek month names.
+%    \begin{macrocode}
+\newcommand*{\DTMgreekmonthname}[1]{%
+  \ifcase#1
+  \or
+  Ianouar\protect\'iou%
+  \or
+  Febrouar\protect\'iou%
+  \or
+  Mart\protect\'iou%
+  \or
+  April\protect\'iou%
+  \or
+  Ma\protect\'{\protect\"i}ou%
+  \or
+  Ioun\protect\'iou%
+  \or
+  Ioul\protect\'iou%
+  \or
+  Augo\protect\'ustou%
+  \or
+  Septembr\protect\'iou%
+  \or
+  Oktwbr\protect\'iou%
+  \or
+  Noembr\protect\'iou%
+  \or
+  Dekembr\protect\'iou%
+  \fi
+}
+%    \end{macrocode}
+%\end{macro}
+%
+%\iffalse
+%    \begin{macrocode}
+%</datetime2-greek-ascii.ldf>
+%    \end{macrocode}
+%\fi
+%
+%\subsection{Main Greek Module (\texttt{datetime2-greek.ldf})}
+%\changes{1.0}{2015-03-30}{Initial release}
+%
+%\iffalse
+%    \begin{macrocode}
+%<*datetime2-greek.ldf>
+%    \end{macrocode}
+%\fi
+%
+% Identify Module
+%    \begin{macrocode}
+\ProvidesDateTimeModule{greek}[2018/04/18 v1.1]
+%    \end{macrocode}
+% Need to find out if XeTeX or LuaTeX are being used.
+%    \begin{macrocode}
+\RequirePackage{ifxetex,ifluatex}
+%    \end{macrocode}
+% XeTeX and LuaTeX natively support UTF-8, so load
+% \texttt{greek-utf8} if either of those engines are used
+% otherwise load \texttt{greek-ascii}.
+%    \begin{macrocode}
+\ifxetex
+ \RequireDateTimeModule{greek-utf8}
+\else
+ \ifluatex
+   \RequireDateTimeModule{greek-utf8}
+ \else
+   \RequireDateTimeModule{greek-ascii}
+ \fi
+\fi
+%    \end{macrocode}
+%
+% Define the \texttt{greek} style.
+% The time style is the same as the "default" style
+% provided by \sty{datetime2}. This may need correcting. For
+% example, if a 12 hour style similar to the "englishampm" (from the
+% "english-base" module) is required. 
+%
+% Allow the user a way of configuring the "greek" and
+% "greek-numeric" styles. This doesn't use the package wide
+% separators such as
+% \cs{dtm@datetimesep} in case other date formats are also required.
+%\begin{macro}{\DTMgreekdaymonthsep}
+% The separator between the day and month for the text format.
+%    \begin{macrocode}
+\newcommand*{\DTMgreekdaymonthsep}{\space}
+%    \end{macrocode}
+%\end{macro}
+%
+%\begin{macro}{\DTMgreekmonthyearsep}
+% The separator between the month and year for the text format.
+%    \begin{macrocode}
+\newcommand*{\DTMgreekmonthyearsep}{\space}
+%    \end{macrocode}
+%\end{macro}
+%
+%\begin{macro}{\DTMgreekdatetimesep}
+% The separator between the date and time blocks in the full format
+% (either text or numeric).
+%    \begin{macrocode}
+\newcommand*{\DTMgreekdatetimesep}{\space}
+%    \end{macrocode}
+%\end{macro}
+%
+%\begin{macro}{\DTMgreektimezonesep}
+% The separator between the time and zone blocks in the full format
+% (either text or numeric).
+%    \begin{macrocode}
+\newcommand*{\DTMgreektimezonesep}{\space}
+%    \end{macrocode}
+%\end{macro}
+%
+%\begin{macro}{\DTMgreekdatesep}
+% The separator for the numeric date format.
+%    \begin{macrocode}
+\newcommand*{\DTMgreekdatesep}{.}
+%    \end{macrocode}
+%\end{macro}
+%
+%\begin{macro}{\DTMgreektimesep}
+% The separator for the numeric time format.
+%    \begin{macrocode}
+\newcommand*{\DTMgreektimesep}{:}
+%    \end{macrocode}
+%\end{macro}
+%
+%Provide keys that can be used in \cs{DTMlangsetup} to set these
+%separators.
+%    \begin{macrocode}
+\DTMdefkey{greek}{daymonthsep}{\renewcommand*{\DTMgreekdaymonthsep}{#1}}
+\DTMdefkey{greek}{monthyearsep}{\renewcommand*{\DTMgreekmonthyearsep}{#1}}
+\DTMdefkey{greek}{datetimesep}{\renewcommand*{\DTMgreekdatetimesep}{#1}}
+\DTMdefkey{greek}{timezonesep}{\renewcommand*{\DTMgreektimezonesep}{#1}}
+\DTMdefkey{greek}{datesep}{\renewcommand*{\DTMgreekdatesep}{#1}}
+\DTMdefkey{greek}{timesep}{\renewcommand*{\DTMgreektimesep}{#1}}
+%    \end{macrocode}
+%
+% TODO: provide a boolean key to switch between full and abbreviated
+% formats if appropriate. (I don't know how the date should be
+% abbreviated.)
+%
+% Define a boolean key that determines if the time zone mappings
+% should be used.
+%    \begin{macrocode}
+\DTMdefboolkey{greek}{mapzone}[true]{}
+%    \end{macrocode}
+% The default is to use mappings.
+%    \begin{macrocode}
+\DTMsetbool{greek}{mapzone}{true}
+%    \end{macrocode}
+%
+% Define a boolean key that determines if the day of month should be
+% displayed.
+%    \begin{macrocode}
+\DTMdefboolkey{greek}{showdayofmonth}[true]{}
+%    \end{macrocode}
+% The default is to show the day of month.
+%    \begin{macrocode}
+\DTMsetbool{greek}{showdayofmonth}{true}
+%    \end{macrocode}
+%
+% Define a boolean key that determines if the year should be
+% displayed.
+%    \begin{macrocode}
+\DTMdefboolkey{greek}{showyear}[true]{}
+%    \end{macrocode}
+% The default is to show the year.
+%    \begin{macrocode}
+\DTMsetbool{greek}{showyear}{true}
+%    \end{macrocode}
+%
+% Define the "greek" style. (TODO: implement day of week?)
+%    \begin{macrocode}
+\DTMnewstyle
+ {greek}% label
+ {% date style
+   \renewcommand*\DTMdisplaydate[4]{%
+     \DTMifbool{greek}{showdayofmonth}
+     {\DTMgreekordinal{##3}\DTMgreekdaymonthsep}%
+     {}%
+     \DTMgreekmonthname{##2}%
+     \DTMifbool{greek}{showyear}%
+     {%
+       \DTMgreekmonthyearsep
+       \number##1
+     }%
+     {}%
+   }%
+   \renewcommand*\DTMDisplaydate{\DTMdisplaydate}%
+ }%
+ {% time style (use default)
+   \DTMsettimestyle{default}%
+ }%
+ {% zone style
+   \DTMresetzones
+   \DTMgreekzonemaps
+   \renewcommand*{\DTMdisplayzone}[2]{%
+     \DTMifbool{greek}{mapzone}%
+     {\DTMusezonemapordefault{##1}{##2}}%
+     {%
+       \ifnum##1<0\else+\fi\DTMtwodigits{##1}%
+       \ifDTMshowzoneminutes\DTMgreektimesep\DTMtwodigits{##2}\fi
+     }%
+   }%
+ }%
+ {% full style
+   \renewcommand*{\DTMdisplay}[9]{%
+    \ifDTMshowdate
+     \DTMdisplaydate{##1}{##2}{##3}{##4}%
+     \DTMgreekdatetimesep
+    \fi
+    \DTMdisplaytime{##5}{##6}{##7}%
+    \ifDTMshowzone
+     \DTMgreektimezonesep
+     \DTMdisplayzone{##8}{##9}%
+    \fi
+   }%
+   \renewcommand*{\DTMDisplay}{\DTMdisplay}%
+ }%
+%    \end{macrocode}
+%
+% Define numeric style.
+%    \begin{macrocode}
+\DTMnewstyle
+ {greek-numeric}% label
+ {% date style
+    \renewcommand*\DTMdisplaydate[4]{%
+      \DTMifbool{greek}{showdayofmonth}%
+      {%
+        \number##3 % space intended
+        \DTMgreekdatesep
+      }%
+      {}%
+      \number##2 % space intended
+      \DTMifbool{greek}{showyear}%
+      {%
+        \DTMgreekdatesep
+        \number##1 % space intended
+      }%
+      {}%
+    }%
+    \renewcommand*{\DTMDisplaydate}[4]{\DTMdisplaydate{##1}{##2}{##3}{##4}}%
+ }%
+ {% time style
+    \renewcommand*\DTMdisplaytime[3]{%
+      \number##1
+      \DTMgreektimesep\DTMtwodigits{##2}%
+      \ifDTMshowseconds\DTMgreektimesep\DTMtwodigits{##3}\fi
+    }%
+ }%
+ {% zone style
+   \DTMresetzones
+   \DTMgreekzonemaps
+   \renewcommand*{\DTMdisplayzone}[2]{%
+     \DTMifbool{greek}{mapzone}%
+     {\DTMusezonemapordefault{##1}{##2}}%
+     {%
+       \ifnum##1<0\else+\fi\DTMtwodigits{##1}%
+       \ifDTMshowzoneminutes\DTMgreektimesep\DTMtwodigits{##2}\fi
+     }%
+   }%
+ }%
+ {% full style
+   \renewcommand*{\DTMdisplay}[9]{%
+    \ifDTMshowdate
+     \DTMdisplaydate{##1}{##2}{##3}{##4}%
+     \DTMgreekdatetimesep
+    \fi
+    \DTMdisplaytime{##5}{##6}{##7}%
+    \ifDTMshowzone
+     \DTMgreektimezonesep
+     \DTMdisplayzone{##8}{##9}%
+    \fi
+   }%
+   \renewcommand*{\DTMDisplay}{\DTMdisplay}%
+ }
+%    \end{macrocode}
+%
+%\begin{macro}{\DTMgreekzonemaps}
+% The time zone mappings are set through this command, which can be
+% redefined if extra mappings are required or mappings need to be
+% removed.
+%    \begin{macrocode}
+\newcommand*{\DTMgreekzonemaps}{%
+  \DTMdefzonemap{02}{00}{EET}%
+  \DTMdefzonemap{03}{00}{EEST}%
+}
+%    \end{macrocode}
+%\end{macro}
+
+% Switch style according to the \opt{useregional} setting.
+%    \begin{macrocode}
+\DTMifcaseregional
+{}% do nothing
+{\DTMsetstyle{greek}}
+{\DTMsetstyle{greek-numeric}}
+%    \end{macrocode}
+%
+% Redefine \cs{dategreek} (or \cs{date}\meta{dialect}) to prevent
+% \sty{babel} from resetting \cs{today}. (For this to work,
+% \sty{babel} must already have been loaded if it's required.)
+%\changes{1.1}{2018-04-18}{removed spurious space}
+%    \begin{macrocode}
+\ifcsundef{date\CurrentTrackedDialect}
+{%
+  \ifundef\dategreek
+  {% do nothing
+  }%
+  {%
+    \def\dategreek{%
+      \DTMifcaseregional
+      {}% do nothing
+      {\DTMsetstyle{greek}}%
+      {\DTMsetstyle{greek-numeric}}%
+    }%
+  }%
+}%
+{%
+  \csdef{date\CurrentTrackedDialect}{%
+    \DTMifcaseregional
+    {}% do nothing
+    {\DTMsetstyle{greek}}%
+    {\DTMsetstyle{greek-numeric}}%
+  }%
+}%
+%    \end{macrocode}
+%\iffalse
+%    \begin{macrocode}
+%</datetime2-greek.ldf>
+%    \end{macrocode}
+%\fi
+%\Finale
+\endinput
diff --git a/macros/latex/contrib/datetime2-contrib/datetime2-greek/datetime2-greek.ins b/macros/latex/contrib/datetime2-contrib/datetime2-greek/datetime2-greek.ins
new file mode 100644
index 0000000000..18969acec2
--- /dev/null
+++ b/macros/latex/contrib/datetime2-contrib/datetime2-greek/datetime2-greek.ins
@@ -0,0 +1,61 @@
+\input docstrip
+
+\preamble
+
+ datetime2-greek.dtx
+ Copyright 2018 Nicola Talbot
+
+ This work may be distributed and/or modified under the
+ conditions of the LaTeX Project Public License, either version 1.3
+ of this license of (at your option) any later version.
+ The latest version of this license is in
+   http://www.latex-project.org/lppl.txt
+ and version 1.3 or later is part of all distributions of LaTeX
+ version 2005/12/01 or later.
+
+ This work has the LPPL maintenance status `inactive'.
+
+ This work consists of the files datetime2-greek.dtx and
+ datetime2-greek.ins and the derived files
+ datetime2-greek-utf8.ldf, datetime2-greek-ascii.ldf and
+ datetime2-greek.ldf.
+
+\endpreamble
+
+\askforoverwritefalse
+
+\generate
+{%
+  \file
+  {datetime2-greek-utf8.ldf}%
+  {%
+   \usepreamble\defaultpreamble
+   \usepostamble\defaultpostamble
+   \from{datetime2-greek.dtx}{datetime2-greek-utf8.ldf,package}%
+  }%
+}
+
+\generate
+{%
+  \file
+  {datetime2-greek-ascii.ldf}%
+  {%
+   \usepreamble\defaultpreamble
+   \usepostamble\defaultpostamble
+   \from{datetime2-greek.dtx}{datetime2-greek-ascii.ldf,package}%
+  }%
+}
+
+\generate
+{%
+  \file
+  {datetime2-greek.ldf}%
+  {%
+   \usepreamble\defaultpreamble
+   \usepostamble\defaultpostamble
+   \from{datetime2-greek.dtx}{datetime2-greek.ldf,package}%
+  }%
+}
+
+\endbatchfile
+
diff --git a/macros/latex/contrib/datetime2-contrib/datetime2-greek/datetime2-greek.pdf b/macros/latex/contrib/datetime2-contrib/datetime2-greek/datetime2-greek.pdf
new file mode 100644
index 0000000000..648e56fe67
--- /dev/null
+++ b/macros/latex/contrib/datetime2-contrib/datetime2-greek/datetime2-greek.pdf