Jason, is this a Tableau question? Or an EssbaseCube question? Are you wanting to manipulate dates in Tableau? Or in EssbaseCube? Thanks,
I'm creating a calculated member in tableau using mdx.
We're connecting to an Essbase cube.
You might take a look at this thread: http://community.tableau.com/message/192670#192670
I suspect Russell's response is still true:
"I don't think there are many people here expert enough with MDX to help you with the "how do I write an MDX statement to do this" part of your question. I'd suggest you try Microsoft's Analysis Services forums to address that part of your problem."