Trouble using \formatdate inside \caption

Question

I am having trouble formatting a date inside a caption using the datetime package. I'm told "Incomplete \iffalse; all text was ignored after line 6.

\documentclass{article}
\usepackage{datetime}
\begin{document}

\begin{figure}[h]
  \caption{Something that happened on \formatdate{30}{9}{2010}}
\end{figure}

\end{document}

If \formatdate is removed from \caption, the document compiles as expected. Also, I have tested \formatdate and it works when placed elsewhere. It seems to not like captions though...

So, any ideas how to format a date inside a caption?

Answer 1

You can use protect

documentclass{article}
\usepackage{datetime}
\begin{document}

\begin{figure}[h]
  \caption{Something that happened on \protect\formatdate{30}{9}{2010}}
\end{figure}

\end{document}