Subtracting 2 dates results is too large on number of days

[jpt1228]

I am trying to calculate the % of days elapsed since the beginning of a custom fiscal 4 week period. I have a date table with date, week in year, fiscal week, is current week etc. In another post someone suggested adding a new column that would return the first day of the current fiscal period, but when I usethe datediff function it returns elapsed days such as 1,878 rather than 4-25-19 minus 4-20-19 = 5

https://community.powerbi.com/t5/Desktop/of-time-elapsed-in-custom-4-week-fiscal-period/m-p/690433#M...

first day per period =
CALCULATE ( MIN ( [Date] ), ALLEXCEPT ( 'Table', 'Table'[Fiscal period] ) )

[v-lili6-msft]

hi, @jpt1228 

What is your expected output?

datediff(3/23/2014 , today(), day) is right, why it should be 4-25-19 minus 4-20-19 = 5

I didn't see 4-25-19 or 4-20-19 in the screenshot.

Best Regards,

Lin

[jpt1228]

Hi @v-lili6-msft I was using those 2 dates as an example. Given the below date table it appears that the fiscal period start date is correct for the month/day but incorrect for the year. I would like the Date Short highlighted 5-23-19 to show how many days have elapsed since the first day of the fiscal period which started on 5-19-19.

5-23-19 minus 5-19-19 = 4. On 5-24-19 the calculation would be 5-24-19 minus 5-19-19 = 5. 

[v-lili6-msft]

hi, @jpt1228 

Sorry for the late reply, Try this formula to create a column

Column = IF('Date'[IsCurrentFiscalPeriod]=TRUE(),DATEDIFF(CALCULATE(MIN('Date'[Date Short]),FILTER('Date','Date'[IsCurrentFiscalPeriod]=TRUE())),'Date'[Date Short],DAY))

OR

Column 2 = IF('Date'[IsCurrentFiscalPeriod]=TRUE()&&'Date'[Date Short]>=TODAY(),DATEDIFF(CALCULATE(MIN('Date'[Date Short]),FILTER('Date','Date'[IsCurrentFiscalPeriod]=TRUE())),'Date'[Date Short],DAY))

Result:

Best Regards,

Lin

[jpt1228]

Hello @v-lili6-msft  - I created a column as suggested but not getting the desired result. The Min date in the table starts in year 2014. 

I think the problem is the IsCurrentFiscalPeriod repeats every year as True rather than just the current fiscal period in the current year.

the column formula for IsCurrentFiscalPeriod is:

IsCurrentFiscalPeriod =

VAR TodaysPeriod = MINX(FILTER(DimDate, DimDate[Date] =

TODAY()), DimDate[FLO Fiscal Period])

RETURN

IF(dimdate[FLO Fiscal Period] = TodaysPeriod, TRUE(), FALSE())

[v-lili6-msft · Accepted solution]

hi, @jpt1228 

"I think the problem is the IsCurrentFiscalPeriod repeats every year as True rather than just the current fiscal period in the current year."

This should be the reason for the problem, So just add a conditional in the formula:

Column =
IF (
    'Date'[IsCurrentFiscalPeriod] = TRUE ()
        && 'Date'[Year] = YEAR ( TODAY () ),
    DATEDIFF (
        CALCULATE (
            MIN ( 'Date'[Date Short] ),
            FILTER (
                'Date',
                'Date'[IsCurrentFiscalPeriod] = TRUE ()
                    && 'Date'[Year] = YEAR ( TODAY () )
            )
        ),
        'Date'[Date Short],
        DAY
    )
)

Best Regards,

Lin