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The Relative Date slicer is a great tool in Power BI, which we covered in a previous blog.
By default, it uses today's date as the end date in a given range, but this can be changed.

10 days back from today's date at time of writing.
To change the comparison date, go to the Format visual pane and navigate to Values | Values | Anchor date, then enter the new date.

The new date will be used instead of today's date.
One common choice is to use the beginning of your financial year as the comparison point.

Sadly, at the time of writing, this value cannot be dynamic.
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