Assuming your date is in [Date]
Create a new dimension and type the following and drag it to your filter shelf
[Date] <= TODAY()
Won't that look at every other Period End Date prior to today though? I want to look at only data between each period end date (in today's case, only data with Period End Date of 6/8/18). Using the calculation above, it will check to make sure that we are at/below 6/8/18, but it will include all past data, which we don't want.
Here is an abbreviated listing of dates in the Period End Date field:
Because today (6/6/18) is greater than 6/1/18 and less than 6/8/18, it should pull only the data that has Period End Date of 6/8/18.
I figured it out myself. In case anyone wants to know, I used:
DATETRUNC('week', TODAY()) = DATETRUNC('week', [PeriodEndDate])