DateDiff between two dates excluding weekends and holidays

Hi Anonymous ,

In order to better check the calculation results, I modify the expression to just calculate the datediff of hours.

You can use TRUNC to truncates a number to an integer by removing the decimal, or fractional, part of the number, like TRUNC( DateDiff_Hour / 24 ).

Working Days (with Calendar Job Booking table) = 
VAR t1 =
    CALENDAR (
        [JOB_BOOKING_DATETIME],
        IF (
            ISBLANK ( [ACCEPTANCE_DATETIME] )
                || [JOB_BOOKING_DATETIME] > [ACCEPTANCE_DATETIME],
            [JOB_BOOKING_DATETIME],
            [ACCEPTANCE_DATETIME]
        )
    )
VAR t2 =
    FILTER (
        ADDCOLUMNS (
            t1,
            "IsWorkDay_",
                LOOKUPVALUE (
                    'Calendar Job Booking'[WorkingDay],
                    'Calendar Job Booking'[Date], [Date]
                )
        ),
        [IsWorkDay_] = "Yes"
    )
VAR Days_ =
    COUNTROWS ( t2 ) - 1
VAR StartWorkingDateTime =
    MINX ( t2, [Date] )
VAR EndWorkingDateTime =
    MAXX ( t2, [Date] )
VAR JOB_BOOKING_DATE =
    DATE ( YEAR ( [JOB_BOOKING_DATETIME] ), MONTH ( [JOB_BOOKING_DATETIME] ), DAY ( [JOB_BOOKING_DATETIME] ) )
VAR ACCEPTANCE_DATE =
    DATE ( YEAR ( [ACCEPTANCE_DATETIME] ), MONTH ( [ACCEPTANCE_DATETIME] ), DAY ( [ACCEPTANCE_DATETIME] ) )
VAR DateDiff_Start =
    IF (
        StartWorkingDateTime = JOB_BOOKING_DATE,
        DATEDIFF ( StartWorkingDateTime, [JOB_BOOKING_DATETIME], HOUR )
    )
VAR DateDiff_End =
    IF (
        EndWorkingDateTime = ACCEPTANCE_DATE,
        DATEDIFF ( EndWorkingDateTime, [ACCEPTANCE_DATETIME], HOUR )
    )
VAR DateDiff_Hour =
    IF (
        ISBLANK ( [ACCEPTANCE_DATETIME] )
            || [JOB_BOOKING_DATETIME] > [ACCEPTANCE_DATETIME],
        BLANK (),
        Days_ * 24 - DateDiff_Start + DateDiff_End
    )
RETURN
    DateDiff_Hour

Best Regards,

Icey

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