Titling package and date formatting

Question

I am using the titling package the resuse the defined date etc. using a plain \thedate command. However the date format is not what I need because of different type of localization.

My first shot was using isodate package using an appropriate option but this seems not to work with the titling package.

Anyway, here is what I created:

\documentclass{article}

\usepackage[ngerman]{babel}
\usepackage[ngerman]{isodate}
\usepackage{titling}

\setlength{\parindent}{0pt}

\date{\today}

\begin{document}
typically this: \thedate \\
should be: \today \\
but it is: {\origdate\thedate} \\
not even: {\isodate\thedate} \\
\end{document}

Clearification: My intention is to reuse the defined date using \date with any apropriate tool. I came up using titling which works great for titles etc. but the date show formatting issues (\today and \thedate differ). Following a comment I tried to use the datetime2 package, which does not seem to work using the date reference solution I use so far.

Here is a snippet using datetime2 package:

\documentclass{article}

\usepackage[ngerman]{babel}
\usepackage[useregional]{datetime2}
\usepackage{titling}

\setlength{\parindent}{0pt}

\date{\today}
%\DTMsavedate{date0}{\thedate} % does not compile
\DTMsavedate{date1}{2017-04-25}

\begin{document}
\selectlanguage{ngerman}
%maybe this: \DTMdate{\thedate} \\ % neither does this
wait, what: \DTMusedate{date1} \\
\end{document}

Answer 1

Write your own converter.

\documentclass{article}

\usepackage[ngerman]{babel}
\usepackage[ngerman]{isodate}
\usepackage{titling}

\setlength{\parindent}{0pt}

\date{\today}

\newcommand\convertdate[1]{\expandafter\convertdateaux#1\relax}
\def\convertdateaux#1 #2, #3\relax{#2.\@ #1 #3}

\begin{document}
typically this: \thedate \\
should be: \today \\
but it is: {\origdate\thedate} \\
not even: {\isodate\thedate} \\

How about \convertdate{\thedate}?
\end{document}