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excelpivot-table

Wrong Week Numbers Displayed In Pivot Table


The data in a pivot table is displaying wrong week numbers for given dates, essentially the weeknum is ahead by 1 week,

enter image description here

Thanks in advance


Solution

  • You haven't shared your raw data but I assume you have used the WEEKNUM function.

    I think the problem you are having is due to using WEEKNUM instead of ISOWEEKNUM.

    WEEKNUM starts counting weeks from the very first day of the year, which results in not every week having 7 days.

    ISOWEEEKNUM ensures every week has 7 days but does mean that one week can run over 2 years (which can cause it's own issues).

    Please see the table below showing how the results of the two functions vary:

    enter image description here