Allow overview "group by" for datetime attributes

What is your original issue/pain point you want to solve?
I want to create an overview that is grouped by a datetime field.

Which are one or two concrete situations where this problem hurts the most?
I use a datetime field to track the date & time of events and want to group an overview by this datetime field to group the tickets by event datetime.

Why is it not solvable with the Zammad standard?
Because overviews let me group by date attributes, but not datetime attributes.

What is your expectation/what do you want to achieve?
Being able to group overviews by datetime attributes.