Forum Discussion

StephenF's avatar
StephenF
Responsive Resident
3 years ago
Solved

Weekofyear doesnt work

Its telling me 1st of jan 2023 is week 1, its not, its week 53.

 

I'm in Europe.

 

Whats a fix I can use as a custom column in the query editor?

 

 

Need Help
  • v-zhangti's avatar
    v-zhangti
    3 years ago

    Hi, StephenF 

     

    This is the default result in DAX functions.

    If you want January 1, 2023 to be week 53, you can try this method.

    Week = 
IF (
    [Date] = DATE ( 2023, 1, 1 ),
    WEEKNUM ( [Date] - 1, 2 ),
    IF ( [Date] > DATE ( 2023, 1, 1 ), WEEKNUM ( [Date], 2 ) - 1, [Weeknum] )
)

    Hope that can help you.

     

    Best Regards,

    Community Support Team _Charlotte

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

2 Replies

  • v-zhangti's avatar
    v-zhangti
    Community Support
    3 years ago

    Hi, StephenF 

     

    This is the default result in DAX functions.

    If you want January 1, 2023 to be week 53, you can try this method.

    Week = 
IF (
    [Date] = DATE ( 2023, 1, 1 ),
    WEEKNUM ( [Date] - 1, 2 ),
    IF ( [Date] > DATE ( 2023, 1, 1 ), WEEKNUM ( [Date], 2 ) - 1, [Weeknum] )
)

    Hope that can help you.

     

    Best Regards,

    Community Support Team _Charlotte

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

  • AilleryO's avatar
    AilleryO
    Memorable Member
    3 years ago

    Hi,

     

    If you want to create a column with ISO week number in your date table here is a step by step formula to calculate week num according to ISO (DateRef is the column with the date in date table) :

    //Calculate week num ISO (Europe) in 4 steps
    //1. Calculate Thursday of week
    InsertCurrThursday = Table.AddColumn(InsertMonthEnding, "CurrThursday", each Date.AddDays([DateRef], -Date.DayOfWeek([DateRef],1) + 3), type date),
    //2. Calculate 1st january of the year (cf step 1) 
    InsertFirstJan = Table.AddColumn(InsertCurrThursday, "FirstJan", each#date(Date.Year([CurrThursday]),1,1),type date),
    //3. Calculate number of days betweeen thursday and 1st january
    // (cf step 1 and 2)
    InsertDuration= Table.AddColumn(InsertFirstJan, "Duration", each Duration.Days(Duration.From([CurrThursday] - [FirstJan])), type number),
    //4. Divide the number of days from step 3 by 7
    //round down and add 1
    InsertISOWeekNum = Table.AddColumn(InsertDuration, "NumSemISO", each Number.RoundDown([Duration]/7)+1), 
    ChangeType5=Table.TransformColumnTypes(InsertISOWeekNum,{{"NumSemISO", Int64.Type}}),
    Format2Chiffres=Table.AddColumn(ChangeType5, "SemaineISO", each Number.ToText([NumSemISO],"D2"), type text),// D2 means format with 2 Digits
    //Delete unusefull columns
    RemovedColumns = Table.RemoveColumns(Format2Chiffres, {"CurrThursday","FirstJan","Duration", "NumSemISO"})

     

    Hope it helps