%%
%% The LaTeX Companion, 3ed
%%
%% Example 9-5-11 on page I-700 in "Special features".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{111.0pt}


%StartShownPreambleCommands
\usepackage[T1]{fontenc} \usepackage{lmodern}
\newcommand\born[1]{\textborn\oldstylenums{#1}}
%StopShownPreambleCommands

\begin{document}
I was born \born{5.4.1962}                     \\
or in \textsf{sans serif \born{5.4.1962}}.     \\
Compare this to \legacyoldstylenums{5.4.1962}.
\end{document}