How to change date format from French to US date format?

Question

I am using this latex theme for an upcoming presentation.

Everything is good except one thing: the date, which is in French and I want it in US date formatting.

I tried using \usepackage{datetime} package and define a custom date format, but I get an error that my custom tag is used outside \begin{document}.

I want to access date using \today tag. Can anyone help me dealing with this?

Answer 1

The US date style can be set with datetime2 using the package option en-US. The abbreviated form can be obtained using \DTMlangsetup[en-US]{abbr}.

For example:

\documentclass{beamer}

\usepackage[en-US]{datetime2}
\DTMlangsetup[en-US]{abbr}

\begin{document}

\frame{\maketitle}

\end{document}

This produces the date in the form Jun 22, 2016. The full set of options available in \DTMlangsetup[en-US] are listed in the "English (US)" section of the datetime2-english manual.

Answer 2

Instead of setting the date manually in the line

\date{18 Brumaire 2015}

use

\usepackage[english,calc]{datetime2}
\DTMsavenow{now}% Save current date in 'now'
\date{%
  \DTMfetchday{now} % Retrieve day
  \DTMenglishshortmonthname{\DTMfetchmonth{now}} % Retrieve month (in short form)
  \DTMfetchyear{now}}% Retrieve year