Custom Date and Time Package
Here's the code for mycustomdatetime.sty:
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{mycustomdatetime}[2014/03/20 1.0 My custom date and time format]
\RequirePackage{etoolbox}%
\RequirePackage{pgfkeys,pgfcalendar}
% Time commands:
\newcommand*{\timefmt}[4]{%
\two@digits{#1}:\two@digits{#2}%
\ifstrempty{#3}% test for empty 3rd argument
{}% no seconds specified
{:\two@digits{#3}}% seconds
\timezonefmt{#4}% time zone
\relax
}
\newcommand*{\timezonefmt}[1]{%
\edef\thistimezone{#1}%
\ifdefempty{\thistimezone}%
{}% empty argument
{%
\expandafter\@timezonefmt\thistimezone\@endtimezonefmt%
}%
}
\def\@timezonefmt#1:#2\@endtimezonefmt{%
\ifnum #2=0\relax
\ifnum #1=0\relax
Z%
\else
\ifnum #1<0 $-$\two@digits{-#1}\else +\two@digits{#1}\fi
\fi
\else
\ifnum #1<0$-$\two@digits{-#1}\else +\two@digits{#1}\fi
:\two@digits{#2}%
\fi
}
\def\parsepdfdatetime#1:#2#3#4#5#6#7#8#9{%
\def\theyear{#2#3#4#5}%
\def\themonth{#6#7}%
\def\theday{#8#9}%
\parsepdftime
}
\def\parsepdftime#1#2#3#4#5#6#7\endparsepdfdatetime{%
\def\thehour{#1#2}%
\def\theminute{#3#4}%
\def\thesecond{#5#6}%
\ifstrequal{#7}{Z}
{%
\def\thetimezone{+00:00}%
}%
{%
\parsepdftimezone#7%
}%
}
\def\parsepdftimezone#1'#2'{%
\def\thetimezone{#1:#2}%
}
\expandafter\parsepdfdatetime\pdfcreationdate\endparsepdfdatetime
\let\pdfhour\thehour
\let\pdfminute\theminute
\let\pdfsecond\thesecond
\let\pdftimezone\thetimezone
\newcommand*{\pdfnowtime}{\timefmt{\pdfhour}{\pdfminute}{\pdfsecond}{\pdftimezone}}
\newcommand*{\pdfnow}{%
\number\year-\two@digits{\month}-\two@digits{\day}
\pdfnowtime
}
\newcommand*{\filedate}[1]{%
\expandafter\parsepdfdatetime\pdffilemoddate{#1}\endparsepdfdatetime
\theyear-\two@digits{\themonth}-\two@digits{\theday}\
\timefmt{\thehour}{\theminute}{\thesecond}{\thetimezone}%
}
% Define an ordinal command:
\newcommand*{\ord}[1]{%
\number#1%
\ifcase#1\or st\or nd\or rd\or th\or th\or th\or th\or th\or
th\or th\or th\or th\or th\or th\or th\or th\or th\or th\or
th\or th\or st\or nd\or rd\or th\or th\or th\or th\or th\or
th\or th\or st\fi
}
% Define registers needed by \printdate:
\newcount\julianday
\newcount\dayofweek
% Define generic date format:
\newcommand*{\datefmt}[4][]{%
\ifstrempty{#1}
{}% day of week missing
{%
\pgfcalendarweekdayname{#1}\space
}%
\ord{#4}~\pgfcalendarmonthname{#3} \number#2%
}
% Define command to convert ISO date to a form that can be used by \datefmt:
\newcommand*{\printdate}[1]{%
\pgfcalendardatetojulian{#1}{\julianday}%
\pgfcalendarjuliantodate{\julianday}{\thisyear}{\thismonth}{\thisday}%
\pgfcalendarjuliantoweekday{\julianday}{\dayofweek}%
% Now display the date:
\datefmt[\dayofweek]{\thisyear}{\thismonth}{\thisday}%
}
% Redefine \today to use the same format:
\renewcommand*{\today}{%
\pgfcalendardatetojulian{\year-\month-\day}{\julianday}%
\pgfcalendarjuliantoweekday{\julianday}{\dayofweek}%
\datefmt[\dayofweek]{\year}{\month}{\day}%
}
% Check if babel is used with the british option:
\AtBeginDocument{%
\ifdef{\datebritish}% check if \datebritish exists
{% it does exist, so redefine it
\renewcommand*{\datebritish}{%
\renewcommand*{\today}{%
\pgfcalendardatetojulian{\year-\month-\day}{\julianday}%
\pgfcalendarjuliantoweekday{\julianday}{\dayofweek}%
\datefmt[\dayofweek]{\year}{\month}{\day}%
}%
}%
}%
{}% doesn't exist, do nothing
}
\endinput
And here's the code for the sample document:
\documentclass{article}
\usepackage{mycustomdatetime}
\begin{document}
The file \jobname.tex was last modified on:
\filedate{\jobname.tex}.
The PDF was built by \TeX\ on: \pdfnow.
Format a specific time (Zulu time):
\timefmt{8}{10}{35}{+0:00}.
Format a specific time (non-Zulu time):
\timefmt{8}{10}{35}{+1:00} or
\timefmt{8}{10}{35}{-4:30} or
\timefmt{8}{10}{35}{+5:45}.
Format a specific time without a time zone:
\timefmt{8}{10}{35}{}.
Format a specific time with a time zone but without seconds:
\timefmt{8}{10}{}{+00:00}.
Format a specific time without a time zone or seconds:
\timefmt{8}{10}{}{}.
\end{document}
Download customdatetime.tex or customdatetime.pdf.