Currently data picker is showing in the description/comments date format as MMM dd, yyyy:

I would like to see the date as dd-MMM-yyyy (ddd). Kindly please help to answer what else should be modified?
Ok, so currently it is:
1. my JIRA account preferences: English (US)
2. my Win10 preferences: English (US) (date format: MM/dd/yyyy)
3. General configuration is setup as below:

4. Look and feel setup is:
