What is the desired functionality that you are missing?

As a User, I would like to create date filters that are able to compare a specific process variable with process instance information (e.g. end date of the instance) or with other process variable date values.

Which problem are you going to solve with this functionality?

Allowing users to create more complex date filters will allow them to use Optimize ad-hoc for analysing data more efficiently.

Today it is e.g. not possible to look at all process instances that ended on the same day as specified as a goal date in a specific variable.

"Show me all process instances that ended on the same day as defined in goal process variable" or

"Show me all process instances that ended later than specified on the goal variable"