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Can you make = Date.WeekOfYear([Date Complete]) start in April for the UK tax year?

As in the title...

I an using = Date.WeekOfYear([Date Field]) to create a custom column so I can do a weekly report. However, I want to start at 1st April, not 1st January. Is it possible to change the result, or when it comes to filtering in a Visualisation?

Second question would be how do I filter to just show this calendar week?

Community Support
Community Support


You can create a custom calendar referring to this blog:

Create a Custom Period Calendar in Power Query - Microsoft Power BI Community


Paul Zheng _ Community Support Team
If this post helps, please Accept it as the solution to help the other members find it more quickly.

Super User
Super User

Try Date.WeekOfYear([Date Field])-Date.WeekOfYear(#date(Year.From([Date Field]), 4,1)+1



I’m usually answering from my phone, which means the results are visualized only in my mind. You’ll need to use my answer to know that it works—but it will work!!
Super User
Super User

I would (strongly) recommend that you use an external calendar table for fiscal years.  This can be a table in SQL server, or in Excel.  Don't try to do it in Power BI, you will regret it.

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