How to fix or work around:

• No built-in way yet to change date format inside Odoo spreadsheets.
• Dates in spreadsheets use a fixed format for now, ignoring locale.

Workarounds:

1. Format dates as text in your spreadsheet (using formulas) to display DD/MM/YYYY manually.
2. Export data and use external tools (Excel, Google Sheets) where you can set date format.
3. Keep an eye on Odoo updates—this is a known limitation and may be improved in future releases.