Date.IsInPreviousNMonths

Date.IsInPreviousNMonths is a Power Query M function that indicates whether the given date(time) value occurs during the previous number of months, as determined by the system. The function returns a boolean value (true or false).

Compatible with: Power BI Service Power BI Desktop Excel Microsoft 365

Syntax

Date.IsInPreviousNMonths(
   dateTime as any,
   months as number,
) as nullable logical

Description

Indicates whether the given datetime value dateTime occurs during the previous number of months, as determined by the current date and time on the system. Note that this function will return false when passed a value that occurs within the current month.

• dateTime: A date, datetime, or datetimezone value to be evaluated.
• months: The number of months.

Examples

Determine if the month before the current system time is in the previous two months.

// Output: true
Date.IsInPreviousNMonths( Date.AddMonths( DateTime.FixedLocalNow(), -1 ), 2 )

Related functions

Other functions related to Date.IsInPreviousNMonths are:

• Date.IsInPreviousNDays
• Date.IsInPreviousNQuarters
• Date.IsInPreviousNWeeks
• Date.IsInPreviousNYears

Last update: August 25, 2023 | Contribute » | Contributors: Rick de Groot
Microsoft documentation: https://learn.microsoft.com/en-us/powerquery-m/date-isinpreviousnmonths
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