Hi @joeweiss ,
It sounds that you need a guideline measure for your report.
Here is one example that is using Verison start and release dates: Version Issues Guideline - Issues - Jira Demo - eazyBI
Also, this article could help you on creating your own formula:
Remember - we all have been at the shallow end of the eazyBI pool before being able to swim in the deep end, keep trying 
And if you need any more help, write to eazyBI support email with more details about your use case and dates you are using in your report, and how you would like your end result to look like!
best,
Gerda // support@eazyBI.com