The date picker is only displayed in English, regardless of the language you choose

Issue Summary

The date picker is showing the months and days in English only, regardless of the language the user chooses.

Steps to Reproduce

1. Go to your profile > Manage Account.
2. Click on Account Preferences.
3. Choose a language different from English.
4. Open an issue in Jira that has a Date Picker field.
5. Select a date.

Expected Results

The date should be displayed in the language that the user chose.

Actual Results

The dates are only displayed in English. See the image below:

Workaround

Currently, there is no known workaround for this behavior. A workaround will be added here when available