Portuguese (Português, Brasil and Portugal) user language - Date format error when starting / editing a Sprint's start/end dates

Summary

If the system or user language is changed to Portuguese then date fields will stop working correctly.
The date picker will return the value 08/Dec/21 5:32 PM, once you submit the form data the following error will be shown:

• '08/Dec/21 5:32 PM' não é uma data válida. Por favor insira a data no seguinte formato: dd/MMM/yy h:mm a

Environment

Steps to Reproduce

Check the video: https://share.getcloudapp.com/2NuP4beW

• Change the user language to Portuguese
• Try starting a sprint
  or
• Try logging work

Expected Results

JIRA accepts the date format returned by the date picker

Actual Results

'08/Dec/21 5:32 PM' não é uma data válida. Por favor insira a data no seguinte formato: dd/MMM/yy h:mm a

Notes

(Optional - If Necessary)

Workaround

Change the month to Portuguese format lower case (08/dez/21 5:32 PM)

Change user language to English on https://id.atlassian.com/manage-profile/account-preferences

Use the Enhanced Jira board and backlog if it is available to you. Screenshot from backlog:

The enhanced board and backlog in Company-managed Projects resolves this bug.

When enhancements are rolled out and available for you, you’ll see a toggle in the view menu, which you can use to switch on and off the enhancements. Note that enhancements are applied per user — you’ll be switching them on for your board and backlog, and not anyone else’s

Follow the updates on our public Cloud Roadmap