Custom Date Formatting (pgfcalendar.sty)
\documentclass{article}
\usepackage{etoolbox}
\usepackage{pgfkeys,pgfcalendar}
\newcount\julianday
\newcount\dayofweek
\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
}
\newcommand*{\printdate}[1]{%
\pgfcalendardatetojulian{#1}{\julianday}%
\pgfcalendarjuliantodate{\julianday}{\thisyear}{\thismonth}{\thisday}%
\pgfcalendarjuliantoweekday{\julianday}{\dayofweek}%
% Now display the date:
\datefmt[\dayofweek]{\thisyear}{\thismonth}{\thisday}%
}
\newcommand*{\datefmt}[4][]{%
\ifstrempty{#1}
{}% day of week missing
{%
\pgfcalendarweekdayname{#1}\space
}%
\ord{#4}~\pgfcalendarmonthname{#3} \number#2%
}
\renewcommand*{\today}{%
\pgfcalendardatetojulian{\year-\month-\day}{\julianday}%
\pgfcalendarjuliantoweekday{\julianday}{\dayofweek}%
\datefmt[\dayofweek]{\year}{\month}{\day}%
}
\begin{document}
Today: \today.
Tomorrow: \printdate{\year-\month-\day+1}.
Yesterday: \printdate{\year-\month-\day+-1}.
The first day of this month: \printdate{\year-\month-1}.
The last day of this month: \printdate{\year-\month-last}.
A specific date: \printdate{2014-3-20}.
A date without the day of week: \datefmt{2014}{3}{20}.
\end{document}
Download pgfprintdate.tex or pgfprintdate.pdf.