title: Calculated Column to get previous year
body: <p>I have a Date table and I want to create a calculated column that gives me the date of the previous year. For example, if the date is 2018 then Previous_Year column should be 2017.</p>
  
  <p>Current Column is [_Year]
  New Calculated Column is [Previous_Year] </p>
  
  <p>In Dax this is what I have [Previous_Year]= DATE(YEAR([_Year]-1,YEAR))</p>
  
  <p>thanks</p>