% This file is public domain.
% This document additionally requires the datetime2-english module
% to be installed.

% arara: pdflatex
\documentclass[italian]{article}

\usepackage{datetime2}

%\DTMsetup{showseconds=false,datesep=/,timesep=.}

\begin{document}
\DTMsavetimestamp{mydate}{2015-04-01T08:05:00+01:00}
\DTMsavetimestamp{mydate2}{2015-04-01T08:13:45+01:00}

Default: \DTMnow. \DTMuse{mydate}.
\typeout{Date-Time (default): \DTMnow. \DTMuse{mydate}.}

\DTMsetstyle{iso}

ISO: \DTMnow. \DTMuse{mydate}.
\typeout{Date-Time (iso): \DTMnow. \DTMuse{mydate}.}

\DTMsetstyle{pdf}

PDF: \DTMnow. \DTMuse{mydate}.
\typeout{Date-Time (pdf): \DTMnow. \DTMuse{mydate}.}

\DTMsetstyle{ddmmyyyy}

ddmmyyyy: \DTMnow. \DTMuse{mydate}.
\typeout{Date-Time (ddmmyyyy): \DTMnow. \DTMuse{mydate}.}

\DTMsetstyle{dmyyyy}

dmyyyy: \DTMnow. \DTMuse{mydate}.
\typeout{Date-Time (dmyyyy): \DTMnow. \DTMuse{mydate}.}

\DTMsetstyle{dmyy}

dmyy: \DTMnow. \DTMuse{mydate}.
\typeout{Date-Time (dmyy): \DTMnow. \DTMuse{mydate}.}

\DTMsetstyle{mmddyyyy}

mmddyyyy: \DTMnow. \DTMuse{mydate}.
\typeout{Date-Time (mmddyyyy): \DTMnow. \DTMuse{mydate}.}

\DTMsetstyle{mdyyyy}

mdyyyy: \DTMnow. \DTMuse{mydate}.
\typeout{Date-Time (mdyyyy): \DTMnow. \DTMuse{mydate}.}

\DTMsetstyle{mdyy}

mdyy: \DTMnow. \DTMuse{mydate}.
\typeout{Date-Time (mdyy): \DTMnow. \DTMuse{mydate}.}

\DTMsetstyle{yyyymd}

yyyymd: \DTMnow. \DTMuse{mydate}.
\typeout{Date-Time (yyyymd): \DTMnow. \DTMuse{mydate}.}

Testing time styles.

\DTMsavetime{noon}{12:00:00}
\DTMsavetime{midnight1}{00:00:00}
\DTMsavetime{midnight2}{24:00:00}
\DTMsavetime{8am}{08:00:00}
\DTMsavetime{8pm}{20:00:00}
\DTMsavetime{1203}{12:03:00}
\DTMsavetime{2401}{24:01:00}
\DTMsavetime{0001}{00:01:00}

\DTMsettimestyle{hmmss}

hmmss: \DTMcurrenttime. \DTMusetime{mydate}.
\DTMusetime{mydate2}.

\DTMusetime{noon}.

\DTMusetime{midnight1}.

\DTMusetime{midnight2}.

\DTMusetime{8am}.

\DTMusetime{8pm}.

\DTMusetime{1203}.

\DTMusetime{2401}.
\DTMusetime{0001}.

\typeout{Time (hmmss): \DTMcurrenttime.
 \DTMusetime{mydate}.
 \DTMusetime{mydate2}.
 \DTMusetime{noon}.
 \DTMusetime{midnight1}.
 \DTMusetime{midnight2}.
 \DTMusetime{8am}.
 \DTMusetime{8pm}.
 \DTMusetime{1203}.
 \DTMusetime{2401}.
 \DTMusetime{0001}.
}

\DTMsettimestyle{italianampm}
ampm: \DTMcurrenttime. 
\DTMusetime{mydate}.
\DTMusetime{mydate2}.
\DTMusetime{noon}.
\DTMusetime{midnight1}.
\DTMusetime{midnight2}.
\DTMusetime{8am}.
\DTMusetime{8pm}.
\DTMusetime{1203}.
\DTMusetime{2401}.
\DTMusetime{0001}.

\typeout{Time (ampm): \DTMcurrenttime.
\DTMusetime{mydate}.
\DTMusetime{mydate2}.
\DTMusetime{noon}.
\DTMusetime{midnight1}.
\DTMusetime{midnight2}.
\DTMusetime{8am}.
\DTMusetime{8pm}.
\DTMusetime{1203}.
\DTMusetime{2401}.
\DTMusetime{0001}.
}

\DTMsettimestyle{italian-twenty-four}
(italian-twenty-four) \DTMcurrenttime. 

\DTMusetime{mydate}.
\DTMusetime{mydate2}.
\DTMusetime{noon}.
\DTMusetime{midnight1}.
\DTMusetime{midnight2}.
\DTMusetime{8am}.
\DTMusetime{8pm}.
\DTMusetime{1203}.
\DTMusetime{2401}.
\DTMusetime{0001}.

\end{document}