#ofMths bases on ReleaseDate = VAR FirstReleaseDate= FIRSTDATE(SalesTable[ReleaseDate]) VAR DateDiff=NOW()-FirstReleaseDate /this is calculating the number of days between current time and firstDate/releasedate but returns the output in date format/ RETURN DIVIDE(VALUE(DateDiff);30;0) //Formats Date as number and Divide by 30 assuming 30 days per month……You could also use FIRSTNONBLANK based on your releasedate format