Pull Request for Issue #41265.

Summary of Changes

This PR fixes the deprecated as described in the issue #41265 . Please look at the issue t understand the actual issue.

Instead of using hardcoded date format, we can set translateformat="true" . It has two benefits:

• No deprecated warnings anymore
• The selected date is display in the format controlled by the use language, more friendly than the hardcoded Y-m-d format

Testing Instructions

1. Use Joomla 5
2. See #41265 , confirm the issue
3. Apply patch, confirm the issue fixed, no deprecated warnings anymore

Actual result BEFORE applying this Pull Request

There is deprecated warnings as described in the issue.

Expected result AFTER applying this Pull Request

No warning anymore. The selected date will still being saved properly. If you use a language which is not using Y-m-d format, the selected date will also be displayed in the date format of your language, too.

Link to documentations

Please select:

• No documentation changes for docs.joomla.org needed

• No documentation changes for manual.joomla.org needed