Benefits of supporting custom date formats in the "Dynamics Project Operations" project task grid for start and finish date:

1. Enhanced User Experience:
2. Localized Date Formats: Users can view dates in a format they are familiar with, reducing confusion and errors.
3. Consistency: Aligns with other regional settings on their devices, providing a seamless experience. Also, it would be consistent with dynamics 365 date format over other date fields
4. Increased Productivity:
5. Quick Recognition: Users can quickly recognize and interpret dates without needing to mentally convert formats.
6. Reduced Training Time: New users can adapt faster as the date format matches their regional standards.
7. Improved Data Accuracy:
8. Minimized Errors: Reduces the risk of misinterpreting dates, which can lead to scheduling errors and project delays.
9. Standardization: Ensures that all team members are on the same page regarding project timelines.
10. Global Collaboration:
11. Cultural Sensitivity: Shows respect for cultural differences, fostering a more inclusive work environment.
12. Ease of Use: Facilitates collaboration among international teams by accommodating diverse date format preferences.
13. Competitive Advantage:
14. User Satisfaction: Enhances overall user satisfaction, potentially increasing adoption rates.
15. Market Appeal: Makes the product more appealing to a global market by addressing regional needs.

Once supported this feature would add significant value to the product and improve the end-user experience and productivity.