Change month names in polyglossia

Question

Based on this answer, the following MWE used to work:

\documentclass{article}
\usepackage{polyglossia}
    \setdefaultlanguage{nynorsk}

\renewcommand\datenynorsk{%
 \def\today{\number\day.~\ifcase\month\or
    i fyrste\or i andre\or i tredje\or i fjerde\or i femte\or i sjette\or
    i sjuande\or i åttande\or i niande\or i tiande\or i ellevte\or
    i tolvte\fi
    \space\number\year}}

\begin{document}
\today
\end{document}

Presumably due to a recent change in polyglossia, the command \datenynorsk is no longer recognized:

! LaTeX Error: Command \datenynorsk undefined.

What do I need to change to the original code above to be able to redefine the month names in the current version of polyglossia?

Answer 1

You need to redefine \datenorwegian@nynorsk; I also made a few changes: the common i can be set by itself, with a tie after it.

\documentclass{article}
\usepackage{polyglossia}
\setdefaultlanguage{nynorsk}

\makeatletter
\renewcommand\datenorwegian@nynorsk{%
  \def\today{\number\day.~i~\ifcase\month\or
    fyrste\or andre\or tredje\or fjerde\or femte\or sjette\or
    sjuande\or åttande\or niande\or tiande\or ellevte\or
    tolvte\fi
    \space\number\year
  }%
}
\makeatother

\begin{document}

\today

\end{document}