Calender Week and Relative Date in Filter function - how to implement ISO Week?

[bilingual]

I use the Relative Date filter in the filter function for showing the last 26 weeks. But the problem is start the Calender Week starts on Sunday, not on Monday... - anybody knows a workaround for this challenge?

[amitchandak]

@bilingual , A new column

ISO Week No = ([Date],21)

[bilingual]

Thanks Amit, but ISO Week or Weeks in generel does not work with the Relative Date filtering.

[v-rzhou-msft]

Hi @bilingual ,

I suggest you to create a date table with ISO weeknum by dax. Than you can create a measure to filter your visual to show data in last 26 weeks.

Date table:

Date =
ADDCOLUMNS (
    CALENDARAUTO (),
    "Year", YEAR ( [Date] ),
    "Month", MONTH ( [Date] ),
    "Weeknum", WEEKNUM ( [Date], 2 ),
    "YearMonth",
        YEAR ( [Date] ) * 100
            + MONTH ( [Date] )
)

Add calculated columns:

ISO 8601 WeekNum = 
VAR _COUNT0 =
    CALCULATE (
        COUNTROWS ( 'Date' ),
        FILTER (
            'Date',
            'Date'[Year] = EARLIER ( 'Date'[Year] )
                && 'Date'[WeekNum] - 1 = 0
        )
    )
VAR _BASENUM1 =
    IF ( _COUNT0 < 7, 'Date'[WeekNum] - 1, 'Date'[WeekNum] )
VAR _ISO_8601_WeekNum =
    IF (
        WEEKDAY ( DATE ( 'Date'[Year] - 1, 01, 01 ) ) <> 1
            && 'Date'[Year] = 'Date'[Year]
            && _BASENUM1 = 0,
        WEEKNUM ( DATE ( MIN ( 'Date'[Year] ), 12, 31 ), 1 ) - 1,
        _BASENUM1
    )
RETURN
    _ISO_8601_WeekNum

ISO_Year = 
VAR _COUNT0 =
    CALCULATE (
        COUNTROWS ( 'Date' ),
        FILTER (
            'Date',
            'Date'[Year] = EARLIER ( 'Date'[Year] )
                && 'Date'[WeekNum] - 1 = 0
        )
    )
VAR _BASENUM1 =
    IF ( _COUNT0 < 7, 'Date'[WeekNum] - 1, 'Date'[WeekNum] )
RETURN
IF(_BASENUM1 = 0,'Date'[Year] -1,'Date'[Year])

ISO YearWeekNum = 'Date'[ISO_Year]*100+'Date'[ISO 8601 WeekNum]

Rank = RANKX('Date','Date'[ISO YearWeekNum],,ASC,Dense)

Create a measure , add this measure into visual level filter and set it to show items when value =1.

Measure = 
VAR _TODAYRANK = CALCULATE(MAX('Date'[Rank]),FILTER(ALL('Date'),'Date'[Date] = TODAY()))

RETURN
IF(MAX('Date'[Rank])<=_TODAYRANK&&MAX('Date'[Rank])>=_TODAYRANK-26,1,0)

Best Regards,
Rico Zhou

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[bilingual]

Hi Rico , thanks alot, however the

Measure = 
VAR _TODAYRANK = CALCULATE(MAX('Date'[Rank]),FILTER(ALL('Date'),'Date'[Date] = TODAY()))

RETURN
IF(MAX('Date'[Rank])<=_TODAYRANK&&MAX('Date'[Rank])>=_TODAYRANK-26,1,0)

I can not make it work as filter on matrix tables, do you know why?