date.Isinpreviousn Year strange result

[JeroenHD]

Hello Team, 

I have a question, because this appears kind of strange to me. Probably there's a good explanation for this, but i don't see it. 

I have added a column with IsInPreviousNYears([Customer_Modified_On],8 ) which is a date-type column. 
However on a date of 23-2-2021 it returns FALSE. I would expect TRUE as it was in the Previous 8 Years.

Does anybody have an idea what goes wrong here?

[v-alq-msft · Accepted solution]

Hi, @JeroenHD 

Based on your description, I created data to reproduce your scenario. The pbix file is attached in the end.

Table:

You may add a new step with the following m codes.

= Table.AddColumn(#"Changed Type", "Custom", each let 
end = Date.From(DateTime.LocalNow()),
start = Date.AddYears(end,-8)
in 
[Date]>=start and [Date]<=end)

Result(Today is 3/4/2021):

Best Regards

Allan

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

[Payeras_BI]

Hi @JeroenHD ,

"Note that this function will return false when passed a value that occurs within the current year."

https://docs.microsoft.com/en-us/powerquery-m/date-isinpreviousnyears

[JeroenHD]

i solved it in Dax now, but i am still curious if anyone can help me figure out what the deal is in Power Query.