Applies to: Calculated column Calculated table Measure Visual calculation


This function is discouraged for use in visual calculations as it likely returns meaningless results.

Returns a table that contains a column of dates shifted one year back in time from the dates in the specified dates column, in the current context.




Term Definition
dates A column containing dates.

Return value

A single-column table of date values.


  • The dates argument can be any of the following:

    • A reference to a date/time column,
    • A table expression that returns a single column of date/time values,
    • A Boolean expression that defines a single-column table of date/time values.
  • Constraints on Boolean expressions are described in the topic, CALCULATE.

  • The dates returned are the same as the dates returned by this equivalent formula: DATEADD(dates, -1, year)

  • This function is not supported for use in DirectQuery mode when used in calculated columns or row-level security (RLS) rules.


The following sample formula creates a measure that calculates the previous year sales of Reseller sales.

= CALCULATE(SUM(ResellerSales_USD[SalesAmount_USD]), SAMEPERIODLASTYEAR(DateTime[DateKey]))  

Time intelligence functions
Date and time functions