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Need DAX help to setup dynamic DATEDIFF dax formula

Per specific moment in time I would like to segmentate the client base in 4 groups based on the total days they are client (< 365 days, between 366 and 730 day, etc). The calculations of the total days is: days between the registration date and [x].


I'm struggling to make a dax formula that shows snapshots of the client base in the past while using the DATEDIFF formula for segmentation.


I started with an additional column to calculate the days: datediff = if(ISBLANK(X[Member until]),0,datediff(X[Registration date],now(),day). However, the date is not dynamic. A possibility is to create many additioanl columns with x, x-1, x-2 etc.  However, there should be a more easy solution. 


Can someone help me to get the following calculations in place?

 <=365 days..count members where datediff(registration_date, x-1) <= 365count members where datediff (registration_date, x-2) <= 365
 between 366 days and 730 days..count members where datediff(registration_date, x-1) between 366 and 730count members where datediff(registration_date, x-2) between 366 and 730
 between 731 days and 1091 days.......
> 1092 days......


X = Registration date (per week/month)

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