Using refinement date

Hello everyone, I am trying to create a new refinement based on a date attribute.

To achieve it I created the refinement:Them I did a rebuild for all indexes, after that If I search for a product document I can see the field is indexed:But it is not bringing filter values for this option in frontend.

I also tried call it direct from code:

allRefinements.getAllRefinementValues('creationDate');

But it brings a empty collection.

If I call:

allRefinements.getAllRefinementValues('brand');

I am able to get results.

I tried it with multiple date fields, but always same result.

If I create a refinement with any other field like String or Boolean it works fine, the problem is just with Date attributes.

Is there any extra step that I need to do when creating a refinement based on a date attribute?

PS: For all date attributes that I tried to use, the values are filled in the product, so the problems is not because product attribute is empty.

Thanks a lot in advance!