Grafana 7.0.x Time Format overrides not working (very sparse)

Hi there,

I recently upgrade to Grafana 7.0.3 and am currently creating a dashboard showing the daily power consumption for the house.
I also added a “Stat”, showing the day of highest power consumption. Unfortunately the date is display as “YYYY-MM-DD hh:mm:ss”. I just like to show the date here, no hours, no minutes. There a two predefined time Formats available under “Unit” on the override tab. Choosing either one, only displays the time in above format.
I entered a custom string into the “Unit” field as “YYYY-MM-DD”, but it has no effect.

This is a screenshot of said override:

Am I missing something here? How can I only show the date?
Any help is greatly appreciated.

Thanks in advance.

There is no need to comment that issue in the GitHub. It is already opened and it has assigned milestone 7.1 = watch the issue and test it when it is marked as resolved in the release notes.