Django FIRST_DAY_OF_WEEK Setting Issue

Based on the documentation, the FIRST_DAY_OF_WEEK setting should affect calendar displays in Django, but there's an important caveat mentioned in the documentation:

This value is only used when not using format internationalization, or when a format cannot be found for the current locale.

This suggests that your issue might be related to internationalization settings. The JavaScript date pickers in the Django Admin might be using locale-specific settings that are overriding your FIRST_DAY_OF_WEEK configuration.

Possible Solutions

1. Check your internationalization settings:

   PYTHONCopied
   USE_I18N = True  # Is this enabled in your settings?

2. If you're using internationalization, you might need to ensure you have the appropriate locale formats defined. You could try setting:

   PYTHONCopied
   FORMAT_MODULE_PATH = 'myproject.formats'  # Replace with your project name

   Then create the appropriate format modules with your preferred first day of week.

3. Make sure your LANGUAGE_CODE setting is correctly configured for your desired locale.

4. If you're specifically concerned about the JavaScript date pickers in the admin, you might need to check if you're using any custom JavaScript that could be overriding the default behavior.

The documentation indicates that FIRST_DAY_OF_WEEK is part of the Globalization (i18n/l10n) settings, so it's closely tied to how Django handles internationalization. If the JavaScript date pickers aren't respecting this setting, it might be because they're using locale-specific formats that take precedence.