Summary
Allow calendar picker customization of its week starting day

💡 What is the requested functionality or behavior?
Enable users to choose a calendar format independently of the selected UI language.

🤷 What’s the use case?
Many companies, including multinational ones, enforce English-only UI for consistency in communication and documentation but need region-specific calendar formats.
Users get confused by Sunday being the starting date for English UI

📅 How does it behave today?
Calendar style is automatically tied to the selected language in the UI.
For English, Sunday is the starting date.

🪄 List any available workarounds
N/A