Description

The datetime DataViews field displays dates and times inconsistently, when the user is not in UTC:

In the above screenshot, the user is in UTC +2. They select 30/10/2025 at midnight, but 29/10/2025 at 22.00 is saved as the value, because the filter value is automatically converted to UTC. The user should see a consistent date and time in the modal and in the saved filter value, so the modal's date/time selectors should also be in UTC.

Step-by-step reproduction instructions

1. Go to the Storybook.
2. Navigate to DataViews > FieldTypes > datetime.
3. Ensure that you are not in UTC.
4. Click to add a filter for the datetime field.
5. Select a date and time.
6. Notice that the saved filter value is different to the one you selected.

Screenshots, screen recording, code snippet

No response

Environment info

No installation -- can be replicated on Storybook.

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

• Yes

Please confirm which theme type you used for testing.

• Block
• Classic
• Hybrid (e.g. classic with theme.json)
• Not sure