\documentclass{article}
\usepackage[basque]{babel}
\usepackage[]{datetime2}
\usepackage{pgffor}


\newcommand{\test}{%
\noindent This PDF was created on \today.

\noindent This PDF was created on \DTMnow.
  \texttt{\\DTMdisplaydate} \DTMdisplaydate{2015}{4}{23}{3}
  \texttt{\\DTMDisplaydate} \DTMDisplaydate{2015}{4}{23}{3}
  \texttt{\\today} \today
  \texttt{\\Today} \Today
  \texttt{\\DTMdate} \DTMdate{2015-04-23}
  \texttt{\\DTMDate} \DTMDate{2015-04-23}
  \texttt{\\DTMdisplaytime} \DTMdisplaytime{10}{30}{23}
  \texttt{\\DTMdisplayzone} \DTMdisplayzone{2}{00}
  \texttt{\\DTMcurrenttime} \DTMcurrenttime
  \texttt{\\DTMcurrentzone} \DTMcurrentzone
  \texttt{\\DTMtime} \DTMtime{10:30:23}
  \texttt{\\DTMdisplay} \DTMdisplay{2015}{04}{23}{3}{10}{30}{23}{2}{00}
  \texttt{\\DTMDisplay} \DTMDisplay{2015}{04}{23}{3}{10}{30}{23}{2}{00}
  \texttt{\\DTMnow} \DTMnow
  \texttt{\\DTMNow} \DTMNow

\vspace*{\baselineskip}
}

\begin{document}
\foreach \style in {basque, basque-numeric}{
%\style
%}
\noindent\texttt{DTMsetstyle\{\style\}} \DTMsetstyle{\style}
 
\test
}

\DTMlangsetup[basque]{inessive=true}
\DTMsetstyle{basque}
 
\test


\end{document}

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