Returns a table that contains a column of all dates from the previous month, based on the first date in the dates column, in the current context.



DatesA column containing dates.

A table containing a single column of date values.

This function returns all dates from the previous month, using the first date in the column used as input. For example, if the first date in the dates argument refers to June 10, 2009, this function returns all dates for the month of May, 2009.

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.

System_CAPS_ICON_note.jpg Note

Constraints on Boolean expressions are described in the topic, CALCULATE Function (DAX).

This DAX function is not supported for use in DirectQuery mode. For more information about limitations in DirectQuery models, see

The following sample formula creates a measure that calculates the 'previous month sales' for the Internet sales.

To see how this works, create a PivotTable and add the fields, CalendarYear and MonthNumberOfYear, to the Row Labels area of the PivotTable. Then add a measure, named Previous Month Sales, using the formula defined in the code section, to the Values area of the PivotTable.

=CALCULATE(SUM(InternetSales_USD[SalesAmount_USD]), PREVIOUSMONTH('DateTime'[DateKey]))  

Time Intelligence Functions (DAX)
Date and Time Functions (DAX)
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