GUI version GNU Emacs (x86_64-w64-mingw32) of 2015-07-25 on KAEL compiled from EmacsW64.

Windows 7 x64 Dutch version.


When I'm evaluating the following snippet:

(format-time-string "%B")

It gives me "August" as result. In the Dutch language, we have "augustus" (spelled in another way, and without any case).

And my operating system is also in Dutch language. When I tried (setq system-time-locale "nl_NL") to no avail. When I check the value of current-language-environment, it gives me UTF-8 as value.

Another suggestions to get the days/months displayed in Dutch?


things are getting weird. On the Windows with the Dutch language (my work pc), I get "August". On my home pc with Windows with the English language, I get "augustus". And it's with the same Emacs configuration. So I guess it's not related to the operating system.

  • "nl_NL" might not be a locale that MS Windows knows about. Windows uses some non-standard aliases for locale names. I found this page, but I don't use Windows and wouldn't be able to figure out what in that table is the actual locale name: msdn.microsoft.com/en-us/library/dd318693.aspx
    – wvxvw
    Commented Aug 27, 2015 at 13:34
  • It should use language according locale settings on Unix-like systems. Not sure about Windows. Commented Aug 27, 2015 at 13:34

1 Answer 1


Have you tried setting environment variable LANG to your language? Similarly, variables LC_TIME etc. - see the Emacs manual, node General Variables. That node also mentions MS Windows in particular: Control Panel > Regional Settings.

See also node Language Environments.

If this helps, it might help to know that I found these nodes (and more) by using i in the Emacs manual. I typed locale at the prompt. TAB then shows you index entries that start with locale.

(Since I use Icicles, I use S-TAB to see index entries that match locale also as a substring, which picks up a couple more entries, such as set-locale-environment.)

  • That was the answer. I noticed that I have set the environment variable LANG to C in Windows. I deleted that variable. After restarting the computer, I get the Dutch spelling for months. Your tip solved my question enventually, so thanks for your answer. And 50 bonud added too. Your contributions to Emacs community are really appreciated.
    – ReneFroger
    Commented Sep 1, 2015 at 7:51

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