%% 
%%  Ein Beispiel der DANTE-Edition
%%  
%%  2. Auflage
%% 
%%  Beispiel 06-03-126 auf Seite 288.
%% 
%%  Copyright (C) 2016 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
%% 
\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{121.16928pt}

%StartShownPreambleCommands
\usepackage{spreadtab}
%StopShownPreambleCommands
\begin{document}
\begin{spreadtab}{{tabular}{cc}}
@1789/7/14     & engshortdatetonum(a1)\\
2001/1/1 :={}  & engshortdatetonum([-1,0])\\
engshortdatetonum(0/3/1)
  & engshortdatetonum(\number\year/%
                \number\month/\number\day)\\
englongdatetonum(February 13, 2005)
  & englongdatetonum(\today)\\
@July 1, 1970  & englongdatetonum(a5)\\\hline
@2010/11/23    & engshortdatetonum([-1,0])\\
@2010/1/1      & engshortdatetonum([-1,0])\\
@Differenz     & :={[0,-2]-[0,-1]} Tage
\end{spreadtab}
\end{document}