eazyBI has an option to import any date custom field as a measure. If you are importing date custom field as a measure, it will create measures with this date, for example.
I have a custom date field Delivery date. I imported it as a measure, and I have a measure Issues with delivery date. This measure will count me any issue with this date, and will show those issues with this date by selected Time.
eazyBI will create a combinations for other numeric custom fields imported as meausure with this date as well. For example, Story Points will have a new measure Story Points with delivery date.