Problem using the acro-package and \today

Question

I have a problem using the tooltip option of the acro-package and the command \today.

In my document i load \usepackage[tooltip = true]{acro}, where the option tooltip=true loads the package pdfcomment which loads the package datetime.

The package datetime changes the behaviour of the command \today (it prints now with the DayOfWeek). I used datetime2 in my document since it is the newer version of datetime. The problem is: datetime2 and it's formating options are totally ignored! It does not matter if i load it before or after the acro package.

I want: 15th June, 2016

I get: Wednesday 15th June, 2016

Because of the problems above I tried \usepackage[nodayofweek]{datetime} instead of datetime2. But the package option nodayofweek creats another error with the package \usepackage{catoptions}:

 LaTeX Error: Option clash for package datetime.

I use catoptions to define a command \Autoref* (which does the same as \autoref* but with a big beginning letter instead of a small letter (e.g. 'Section' instead of 'section').

I have no idea what i should do since so many packages are involved ...

Minimalexample

\documentclass{scrbook}

% \usepackage[nodayofweek]{datetime}
\usepackage[tooltip=true]{acro}
\usepackage{catoptions}

\begin{document}

\today

\end{document}

Answer 1

You can use \PassOptionsToPackage to indicate options for packages that are loaded internally by other packages. For example:

\documentclass{scrbook}

\PassOptionsToPackage{nodayofweek}{datetime}
\usepackage[tooltip=true]{acro}
\usepackage{catoptions}

\begin{document}

\today

\end{document}

If you want to use datetime2, you'll need to ensure that \today is set to \DTMtoday at the beginning of the document to prevent other packages overriding it:

\documentclass{scrbook}

\usepackage[tooltip=true]{acro}
\usepackage{catoptions}
\usepackage[en-GB]{datetime2}
\AtBeginDocument{\let\today\DTMtoday}

\begin{document}

\today

\end{document}

Edit: \DTMtoday requires at least v1.4 of datetime2.