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DateTime.IsInPreviousSecond is a Power Query M function that indicates whether the provided date(time) value occurs during the previous second. The function returns true if the value occurs in the previous second, otherwise false.

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


DateTime.IsInPreviousSecond( dateTime as any ) as nullable logical


DateTime.IsInPreviousSecond indicates whether the given dateTime argument (which can be of type datetime or datetimezone) occurs during the previous second, as determined by the current date and time on the system. This function will return false for a value within the current second.


Determine if the second before the current system time is in the previous second.

// Output: true
DateTime.IsInPreviousSecond( DateTime.FixedLocalNow() - #duration( 0, 0, 0, 1 ) )

Other functions related to DateTime.IsInPreviousSecond are:

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Microsoft documentation: