SAP HANA Studio: Create Time Hierarchy for Lumira

Hey,

I am trying to create a date/time hierarchy in SAP HANA Studio.

I have a graphical calculation view and have created a level hierarchy there:

I have an attribute "DateOfRegistration". Out of this I calculate 3 more attributes (Year, Month, Day), which are INTEGERS and I use them as levels.

But the problem is, that Lumira doesn't detect it as a time hierarchy (instead as a normal hierarchy). I want it like if you create a time hierarchy in Lumira.

Thanks for your help in advance.

Kind regards

Fabian