Skip to main content
cancel
Showing results for 
Search instead for 
Did you mean: 

The Power BI Data Visualization World Championships is back! Get ahead of the game and start preparing now! Learn more

Reply
Anonymous
Not applicable

M Code for 'Week of Month'

Hello,

I use the code below for my date table. I now need an additional column for 'Week of Month'. Accordingly, I wanted to amend the code with this one:

 

InsertWeekofMonth = Table.AddColumn(InsertChangedType, "WeekofMonth", each Date.WeekOfMonth([Date],Day.Monday), type number)

 

In the line above, I have put a comma at the end:

 

    InsertChangedType = Table.TransformColumnTypes(InsertCompletedQuarter,{{"Year", Int64.Type}, {"QuarterOfYear", Int64.Type}, {"MonthOfYear", Int64.Type}, {"DayOfMonth", Int64.Type}, {"DateInt", Int64.Type}, {"DayOfWeek", Int64.Type}, {"ISO Weeknumber", Int64.Type}, {"WeeknYear", Int64.Type}, {"MonthnYear", Int64.Type}, {"QuarternYear", Int64.Type}, {"Fiscal Period", Int64.Type}, {"WeekOffset", Int64.Type}, {"MonthOffset", Int64.Type}, {"QuarterOffset", Int64.Type}, {"YearOffset", Int64.Type}, {"FiscalYearOffset", Int64.Type}}),

 

 

In the 'fxCalendar' in power quwery no syntax errors have been detected, but no additional column is inserted in the Date Table.

Any idea why that doesn't work? Thanks in advance.

 

M Code for date table without 'Week of Month': 

 

let fnDateTable = (StartDate as date, EndDate as date, optional FYStartMonth as number, optional Holidays as list, optional WDStartNum as number ) as table =>
  let
    FYStartMonth = if List.Contains( {1..12}, FYStartMonth ) then FYStartMonth else 1,
    //the WDStartNum parameter allows you to set Weekday numbering running from 0-6 or 1-7 but first day of the week will remain Monday
    WDStart = if List.Contains( {0, 1}, WDStartNum ) then WDStartNum else 0,
    CurrentDate = Date.From(DateTime.FixedLocalNow()),
    DayCount = Duration.Days(Duration.From(EndDate - StartDate))+1,
    Source = List.Dates(StartDate,DayCount,#duration(1,0,0,0)),
    AddToday = if EndDate < CurrentDate then List.Combine( {Source, {CurrentDate}}) else Source,
    TableFromList = Table.FromList(AddToday, Splitter.SplitByNothing()),
    ChangedType = Table.TransformColumnTypes(TableFromList,{{"Column1", type date}}),
    RenamedColumns = Table.RenameColumns(ChangedType,{{"Column1", "Date"}}),
    InsertYear = Table.AddColumn(RenamedColumns, "Year", each Date.Year([Date]), type number),
    InsertQuarter = Table.AddColumn(InsertYear, "QuarterOfYear", each Date.QuarterOfYear([Date]), type number),
    InsertMonth = Table.AddColumn(InsertQuarter, "MonthOfYear", each Date.Month([Date]), type number),
    InsertDay = Table.AddColumn(InsertMonth, "DayOfMonth", each Date.Day([Date]), type number),
    InsertDayInt = Table.AddColumn(InsertDay, "DateInt", each [Year] * 10000 + [MonthOfYear] * 100 + [DayOfMonth], type number),
    InsertMonthName = Table.AddColumn(InsertDayInt, "Month Name", each Date.ToText([Date], "MMMM"), type text),
    InsertCalendarMonth = Table.AddColumn(InsertMonthName, "Month & Year", each (try(Text.Range([Month Name],0,3)) otherwise [Month Name]) & " " & Number.ToText([Year]), type text),
    InsertCalendarQtr = Table.AddColumn(InsertCalendarMonth, "Quarter & Year", each "Q" & Number.ToText([QuarterOfYear]) & " " & Number.ToText([Year]), type text),
    InsertDayWeek = Table.AddColumn(InsertCalendarQtr, "DayOfWeek", each Date.DayOfWeek([Date]) + WDStart, Int64.Type),
    InsertDayName = Table.AddColumn(InsertDayWeek, "DayOfWeekName", each Date.ToText([Date], "dddd"), type text),
    InsertWeekEnding = Table.AddColumn(InsertDayName, "WeekEnding", each Date.EndOfWeek( [Date], Day.Monday), type date),
    InsertMonthEnding = Table.AddColumn(InsertWeekEnding, "MonthEnding", each Date.EndOfMonth([Date]), type date),
    InsertWeekNumber= Table.AddColumn(InsertMonthEnding, "ISO Weeknumber", each
      if Number.RoundDown((Date.DayOfYear([Date])-(Date.DayOfWeek([Date], Day.Monday)+1)+10)/7)=0
      then Number.RoundDown((Date.DayOfYear(#date(Date.Year([Date])-1,12,31))-(Date.DayOfWeek(#date(Date.Year([Date])-1,12,31), Day.Monday)+1)+10)/7)
      else if (Number.RoundDown((Date.DayOfYear([Date])-(Date.DayOfWeek([Date], Day.Monday)+1)+10)/7)=53 and (Date.DayOfWeek(#date(Date.Year([Date]),12,31), Day.Monday)+1<4))
      then 1 else Number.RoundDown((Date.DayOfYear([Date])-(Date.DayOfWeek([Date], Day.Monday)+1)+10)/7), type number),
    InsertISOyear = Table.AddColumn(InsertWeekNumber, "ISO Year", each Date.Year( Date.AddDays( Date.StartOfWeek([Date], Day.Monday), 3 )),  Int64.Type),
    BufferTable = Table.Buffer(Table.Distinct( InsertISOyear[[ISO Year], [DateInt]])),
    InsertISOday = Table.AddColumn(InsertISOyear, "ISO Day of Year", (OT) => Table.RowCount( Table.SelectRows( BufferTable, (IT) => IT[DateInt] <= OT[DateInt] and IT[ISO Year] = OT[ISO Year])),  Int64.Type),
    InsertCalendarWk = Table.AddColumn(InsertISOday, "Week & Year", each Text.From([ISO Year]) & "-" & Text.PadStart( Text.From( [ISO Weeknumber] ), 2, "0"), type text ),
    InsertWeeknYear = Table.AddColumn(InsertCalendarWk, "WeeknYear", each [ISO Year] * 10000 + [ISO Weeknumber] * 100,  Int64.Type),

    InsertMonthnYear = Table.AddColumn(InsertWeeknYear , "MonthnYear", each [Year] * 10000 + [MonthOfYear] * 100, type number),
    InsertQuarternYear = Table.AddColumn(InsertMonthnYear, "QuarternYear", each [Year] * 10000 + [QuarterOfYear] * 100, type number),
    AddFY = Table.AddColumn(InsertQuarternYear, "Fiscal Year", each "FY" & (if [MonthOfYear] >= FYStartMonth then Text.PadEnd( Text.End( Text.From([Year] +1), 2), 2, "0") else Text.End( Text.From([Year]), 2)), type text),
    AddFQ = Table.AddColumn(AddFY, "Fiscal Quarter", each "FQ" & Text.From( Number.RoundUp( Date.Month( Date.AddMonths( [Date], - (FYStartMonth -1) )) / 3 )), type text),
    AddFM = Table.AddColumn(AddFQ, "Fiscal Period", each if [MonthOfYear] >= FYStartMonth then [MonthOfYear] - (FYStartMonth-1) else [MonthOfYear] + (12-FYStartMonth+1), type text),

    InsertIsAfterToday = Table.AddColumn(AddFM, "IsAfterToday", each not ([Date] <= Date.From(CurrentDate)), type logical),
    InsertIsWorkingDay = Table.AddColumn(InsertIsAfterToday, "IsWorkingDay", each if Date.DayOfWeek([Date], Day.Monday) > 4 then false else true, type logical),
    InsertIsHoliday = Table.AddColumn(InsertIsWorkingDay, "IsHoliday", each if Holidays = null then "Unknown" else List.Contains( Holidays, [Date] ), if Holidays = null then type text else type logical),
    InsertIsBusinessDay = Table.AddColumn(InsertIsHoliday, "IsBusinessDay", each if [IsWorkingDay] = true and [IsHoliday] <> true then true else false, type logical),
    InsertDayType = Table.AddColumn(InsertIsBusinessDay, "Day Type", each if [IsHoliday] = true then "Holiday" else if [IsWorkingDay] = false then "Weekend" else if [IsWorkingDay] = true then "Weekday" else null, type text),

    //InsertDayOffset = Table.AddColumn(InsertDayType, "DayOffset", each Number.From([Date] - CurrentDate), type number),  //if you enable DayOffset, don't forget to adjust the PreviousStepName in the next line of code.
    InsertWeekOffset = Table.AddColumn(InsertDayType, "WeekOffset", each (Number.From(Date.StartOfWeek([Date], Day.Monday))-Number.From(Date.StartOfWeek(CurrentDate, Day.Monday)))/7, type number),
    InsertMonthOffset = Table.AddColumn(InsertWeekOffset, "MonthOffset", each ((12 * Date.Year([Date])) +  Date.Month([Date])) - ((12 * Date.Year(Date.From(CurrentDate))) +  Date.Month(Date.From(CurrentDate))), type number),
    InsertQuarterOffset = Table.AddColumn(InsertMonthOffset, "QuarterOffset", each ((4 * Date.Year([Date])) +  Date.QuarterOfYear([Date])) - ((4 * Date.Year(Date.From(CurrentDate))) +  Date.QuarterOfYear(Date.From(CurrentDate))), type number),
    InsertYearOffset = Table.AddColumn(InsertQuarterOffset, "YearOffset", each Date.Year([Date]) - Date.Year(Date.From(CurrentDate)), type number),

    IdentifyCurrentDate = Table.SelectRows(InsertYearOffset, each ([Date] = CurrentDate)),
    CurrentYear = IdentifyCurrentDate{0}[Year],
    CurrentMonth = IdentifyCurrentDate{0}[MonthOfYear],
    InsertFYoffset = Table.AddColumn(InsertYearOffset, "FiscalYearOffset", each try (if [MonthOfYear] >= FYStartMonth then [Year]+1 else [Year]) - 
      (if CurrentMonth >= FYStartMonth then CurrentYear+1 else CurrentYear) otherwise null, type number),
    RemoveToday = if EndDate < CurrentDate then Table.SelectRows(InsertFYoffset, each ([Date] <> CurrentDate)) else InsertFYoffset,
    InsertCompletedWeek = Table.AddColumn(RemoveToday, "WeekCompleted", each [WeekEnding] < Date.From(Date.EndOfWeek(CurrentDate)), type logical),
    InsertCompletedMonth = Table.AddColumn(InsertCompletedWeek, "MonthCompleted", each [MonthEnding] < Date.From(Date.EndOfMonth(CurrentDate)), type logical),
    InsertCompletedQuarter = Table.AddColumn(InsertCompletedMonth, "QuarterCompleted", each Date.EndOfQuarter([Date]) < Date.From(Date.EndOfQuarter(CurrentDate)), type logical),
    InsertChangedType = Table.TransformColumnTypes(InsertCompletedQuarter,{{"Year", Int64.Type}, {"QuarterOfYear", Int64.Type}, {"MonthOfYear", Int64.Type}, {"DayOfMonth", Int64.Type}, {"DateInt", Int64.Type}, {"DayOfWeek", Int64.Type}, {"ISO Weeknumber", Int64.Type}, {"WeeknYear", Int64.Type}, {"MonthnYear", Int64.Type}, {"QuarternYear", Int64.Type}, {"Fiscal Period", Int64.Type}, {"WeekOffset", Int64.Type}, {"MonthOffset", Int64.Type}, {"QuarterOffset", Int64.Type}, {"YearOffset", Int64.Type}, {"FiscalYearOffset", Int64.Type}})
 in
  InsertChangedType
in
fnDateTable

 

 

1 ACCEPTED SOLUTION
Fowmy
Super User
Super User

@Anonymous 

Once you have added the following line the final output after 1st "in" should be " InsertWeekofMonth" that is the final output

InsertWeekofMonth = Table.AddColumn(InsertChangedType, "WeekofMonth", each Date.WeekOfMonth([Date],Day.Monday), type number)

 

Fowmy_0-1621855651250.png

 

 

Did I answer your question? Mark my post as a solution! and hit thumbs up


Subscribe and learn Power BI from these videos

Website LinkedIn PBI User Group

View solution in original post

2 REPLIES 2
Fowmy
Super User
Super User

@Anonymous 

Once you have added the following line the final output after 1st "in" should be " InsertWeekofMonth" that is the final output

InsertWeekofMonth = Table.AddColumn(InsertChangedType, "WeekofMonth", each Date.WeekOfMonth([Date],Day.Monday), type number)

 

Fowmy_0-1621855651250.png

 

 

Did I answer your question? Mark my post as a solution! and hit thumbs up


Subscribe and learn Power BI from these videos

Website LinkedIn PBI User Group

Anonymous
Not applicable

Worked perfectly. Thank you. 

Helpful resources

Announcements
Power BI DataViz World Championships

Power BI Dataviz World Championships

The Power BI Data Visualization World Championships is back! Get ahead of the game and start preparing now!

November Power BI Update Carousel

Power BI Monthly Update - November 2025

Check out the November 2025 Power BI update to learn about new features.

FabCon Atlanta 2026 carousel

FabCon Atlanta 2026

Join us at FabCon Atlanta, March 16-20, for the ultimate Fabric, Power BI, AI and SQL community-led event. Save $200 with code FABCOMM.