[Tex/LaTex] How to change date to different language in a letter

datelanguagesletters

I am using the following template in order to create a letter

\documentclass[version=last]{scrlttr2}
\usepackage[ngerman]{babel}
\begin{document}

\begin{letter}{
  Petra Mustermann\\
  Vor dem Berg 1\\
  12345 Musterhausen
}
\opening{Liebe Vereinsvorsitzende,}
\end{letter}
\end{document}

I would like to have the date to be in german, but the date in the output is in english, as shown in the following picture.
enter image description here
On page 179 of the documentation of the package scrlttr2, the date is correctly printed in german.
I am using Linux and pdflatex.

Best Answer

Here is what i did to get the correct date (see here).

Open a terminal (ctrl + alt + t) and run the following commands:

sudo add-apt-repository ppa:texlive-backports/ppa
sudo apt-get update
sudo apt-get install texlive-lang-german
sudo apt-get upgrade