Seems that the date format is only used in places with fully numeric dates, like 12/31/24.

Dates which are formatted in longer style formats are not affected by date format option.

Changing the language does not change this format either (tested English GB and Polish)

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still relevant

To expand on the reported issue (let me know if I ought to raise a separate issue), HASS has location and language settings but does not seem to have any locale setting (e.g: en-AU, es-ES, or es-CL) and selecting "English GB" the dev tools | statistics | fix issue dialog shows gives US date format:

Here is is using the US date format (mm/dd/yyyy). In the end I found that I must set my user date format explicitly.

Improvements:

• A locale configuration (best options)
• Make system default the much more common dd/mm/yyyy format instead of the US format
• Add system level default date format
• Fix the default format for en-GB to be dd/mm/yyyy

Hi, we are a group of computer science students that are planning to fix this issue as part of a course.
Perhaps this issue can be assigned to me?

We don't typically assign issues to new contributors. Just feel free to put up a pull request when it's ready.

Changing the language does not change this format either (tested English GB and Polish)

I don't think that is true, using English GB + the setting use language settings for date format you would get d-m-y.

@RobSmyth it is just using d-m-y when selecting en-gb here, can you check if your issue still exists?

@RobSmyth it is just using d-m-y when selecting en-gb here, can you check if your issue still exists?

Hi @bramkragten ,

Yes, using en-gb now does give GB date format.

Thank you