Date picker language translation doesn't work properly

Summary

If you have chosen to use 'Automatically detect browser setting' on your Confluence Profile and you set the browser language to Dutch language. The date formats when using date picker in Page Properties is different with Page Properties macro. It's also different when adding a date picker to a page.

Steps to Reproduce

1. Set the language in a user's profile settings as "Automatically detect browser setting".
2. Set the Dutch language in browser settings
3. Try to create dates with the help of the date picker.
4. Insert the Page Properties and Page Properties Report macros.
5. Insert date picker to a page.

Expected Results

• Date formats should be the same and it should follow the desired language.

Actual Results

• The date formats when using date picker in Page Properties is different with Page Properties macro. It's also different when adding a date picker to a page.