DATEADD
Applies to: 
Calculated column
Calculated table
Measure 
Visual calculation
Note
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 either forward or backward in time by the specified number of intervals from the dates in the current context.
Syntax
DATEADD(<dates>,<number_of_intervals>,<interval>)
Parameters
| Term | Definition |
|---|---|
| dates | A column that contains dates. |
| number_of_intervals | An integer that specifies the number of intervals to add to or subtract from the dates. |
| interval | The interval by which to shift the dates. The value for interval can be one of the following: year, quarter, month, day |
Return value
A table containing a single column of date values.
Remarks
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.
Note
Constraints on Boolean expressions are described in the topic, CALCULATE function.
If the number specified for number_of_intervals is positive, the dates in dates are moved forward in time; if the number is negative, the dates in dates are shifted back in time.
The interval parameter is an enumeration, not a set of strings; therefore values should not be enclosed in quotation marks. Also, the values:
year,quarter,month,dayshould be spelled in full when using them.The result table includes only dates that exist in the dates column.
If the dates in the current context do not form a contiguous interval, the function returns an error.
This function is not supported for use in DirectQuery mode when used in calculated columns or row-level security (RLS) rules.
Example - Shifting a set of dates
The following formula calculates dates that are one year before the dates in the current context.
= DATEADD(DateTime[DateKey],-1,year)