Friends Avi Singh published a very nice Calendar table and i've been using it. However the column "WeekSequenceNum" starts counting from the first day in the table, but i also wanted to add a "Weeknum" that starts from 1st January without changing the Calender Table start day to January. My data starts in April but 1st April is week 14 (my week starts from monday to sunday). Since my data starts in 1st April, the "WeekSequenceNum" automatically assign 1st April Week 1. I want to create another custom column on this calendar table that will assign 1st April to Week 14 (weeks starting from Monday to Sunday).
I tried adding a custom column that looks at the date in the calendar to create a WeekNum but i get an error.
Calendar table by Avi Singh:
let
/*
****This Calendar was created and provided by Avi Singh****
****This can be freely shared as long as this text comment is retained.****
http://www.youtube.com/PowerBIPro
www.LearnPowerBI.com by Avi Singh
*/
#"LearnPowerBI.com by Avi Singh" = 1,
StartDate = #date(2025, 4, 1),
EndDate = DateTime.Date(DateTime.LocalNow()) /*was "#date(2017, 1, 1)" Updated on 201802027: hard Coded End of Year caused some formulas to break, switching to dynamic date*/,
//Used for 'Offset' Column calculations, you may Hard code CurrentDate for testing e.g. #date(2017,9,1)
CurrentDate = DateTime.Date(DateTime.FixedLocalNow()),
// Specify the last month in your Fiscal Year, e.g. if June is the last month of your Fiscal Year, specify 6
FiscalYearEndMonth = 6,
#"==SET PARAMETERS ABOVE==" = 1,
#"==Build Date Column==" = #"==SET PARAMETERS ABOVE==",
ListDates = List.Dates(StartDate, Number.From(EndDate - StartDate)+1, #duration(1,0,0,0)),
#"Converted to Table" = Table.FromList(ListDates, Splitter.SplitByNothing(), null, null, ExtraValues.Error),
#"Renamed Columns as Date" = Table.RenameColumns(#"Converted to Table",{{"Column1", "Date"}}),
// As far as Power BI is concerned, the 'Date' column is all that is needed 🙂 But we will continue and add a few Human-Friendly Columns
#"Changed Type to Date" = Table.TransformColumnTypes(#"Renamed Columns as Date",{{"Date", type date}}),
#"==Add Calendar Columns==" = #"Changed Type to Date",
#"Added Calendar MonthNum" = Table.AddColumn(#"==Add Calendar Columns==", "MonthNum", each Date.Month([Date]), Int64.Type),
#"Added Month Name" = Table.AddColumn(#"Added Calendar MonthNum", "Month", each Text.Start(Date.MonthName([Date]),3), type text),
#"Added Month Name Long" = Table.AddColumn(#"Added Month Name", "MonthLong", each Date.MonthName([Date]), type text),
#"Added Calendar Quarter" = Table.AddColumn(#"Added Month Name Long", "Quarter", each "Q" & Text.From(Date.QuarterOfYear([Date]))),
#"Added Calendar Year" = Table.AddColumn(#"Added Calendar Quarter", "Year", each Date.Year([Date]), Int64.Type),
#"==Add Fiscal Calendar Columns==" = #"Added Calendar Year",
#"Added FiscalMonthNum" = Table.AddColumn(#"==Add Fiscal Calendar Columns==", "FiscalMonthNum", each if [MonthNum] > FiscalYearEndMonth
then [MonthNum] - FiscalYearEndMonth
else [MonthNum] + (12 - FiscalYearEndMonth), type number),
#"Added FiscalMonth Name" = Table.AddColumn(#"Added FiscalMonthNum", "FiscalMonth", each [Month]),
#"Added FiscalMonth Name Long" = Table.AddColumn(#"Added FiscalMonth Name", "FiscalMonthLong", each [MonthLong]),
#"Added FiscalQuarter" = Table.AddColumn(#"Added FiscalMonth Name Long", "FiscalQuarter", each "FQ" & Text.From(Number.RoundUp([FiscalMonthNum] / 3,0))),
#"Added FiscalYear" = Table.AddColumn(#"Added FiscalQuarter", "FiscalYear", each "FY" &
Text.End(
Text.From(
if [MonthNum] > FiscalYearEndMonth
then [Year] + 1
else [Year]
)
, 2
)),
#"==Add Calendar Date Offset Columns==" = #"Added FiscalYear",
// Can be used to for example to show the past 3 months(CurMonthOffset = 0, -1, -2)
#"Added CurMonthOffset" = Table.AddColumn(#"==Add Calendar Date Offset Columns==", "CurMonthOffset", each ( Date.Year([Date]) - Date.Year(CurrentDate) ) * 12
+ Date.Month([Date]) - Date.Month(CurrentDate), Int64.Type),
// Can be used to for example to show the past 3 quarters (CurQuarterOffset = 0, -1, -2)
#"Added CurQuarterOffset" = Table.AddColumn(#"Added CurMonthOffset", "CurQuarterOffset", each /*Year Difference*/
( Date.Year([Date]) - Date.Year(CurrentDate) )*4
/*Quarter Difference*/
+ Number.RoundUp(Date.Month([Date]) / 3)
- Number.RoundUp(Date.Month(CurrentDate) / 3),
Int64.Type),
// Can be used to for example to show the past 3 years (CurYearOffset = 0, -1, -2)
#"Added CurYearOffset" = Table.AddColumn(#"Added CurQuarterOffset", "CurYearOffset", each Date.Year([Date]) - Date.Year(CurrentDate), Int64.Type),
// Can be used to for example filter out all future dates
#"Added FutureDate Flag" = Table.AddColumn(#"Added CurYearOffset", "FutureDate", each if [Date] > CurrentDate then "Future" else "Past" ),
// FiscalYearOffset is the only Offset that is different.
// FiscalQuarterOffset = is same as CurQuarterOffset
// FiscalMonthOffset = is same as CurMonthOffset
#"==Add FiscalYearOffset==" = #"Added FutureDate Flag",
#"Filtered Rows to CurrentDate" = Table.SelectRows(#"==Add FiscalYearOffset==", each ([Date] = CurrentDate)),
CurrentFiscalYear = #"Filtered Rows to CurrentDate"{0}[FiscalYear],
#"Continue...Orig Table" = #"==Add FiscalYearOffset==",
#"Added CurFiscalYearOffset" = Table.AddColumn(#"Continue...Orig Table", "CurFiscalYearOffset", each Number.From(Text.Range([FiscalYear],2,2)) -
Number.From(Text.Range(CurrentFiscalYear,2,2))
/*Extract the numerical portion, e.g. FY18 = 18*/),
#"==Add General Columns==" = #"Added CurFiscalYearOffset",
// Used as 'Sort by Column' for MonthYear columns
#"Added MonthYearNum" = Table.AddColumn(#"==Add General Columns==", "MonthYearNum", each [Year]*100 + [MonthNum] /*e.g. Sep-2016 would become 201609*/, Int64.Type),
#"Added MonthYear" = Table.AddColumn(#"Added MonthYearNum", "MonthYear", each [Month] & "-" & Text.End(Text.From([Year]),2)),
#"Added MonthYearLong" = Table.AddColumn(#"Added MonthYear", "MonthYearLong", each [Month] & "-" & Text.From([Year])),
#"Added WeekdayNum" = Table.AddColumn(#"Added MonthYearLong", "WeekdayNum", each Date.DayOfWeek([Date]), Int64.Type),
#"Added Weekday Name" = Table.AddColumn(#"Added WeekdayNum", "Weekday", each Text.Start(Date.DayOfWeekName([Date]),3), type text),
#"Added WeekdayWeekend" = Table.AddColumn(#"Added Weekday Name", "WeekdayWeekend", each if [WeekdayNum] = 0 or [WeekdayNum] = 6
then "Weekend"
else "Weekday"),
#"==Improve Ultimate Table" = #"Added WeekdayWeekend",
#"----Add WeekSequenceNum----" = #"==Improve Ultimate Table",
#"Filtered Rows Sundays Only (Start of Week)" = Table.SelectRows(#"----Add WeekSequenceNum----", each ([WeekdayNum] = 0)),
#"Added Index WeekSequenceNum" = Table.AddIndexColumn(#"Filtered Rows Sundays Only (Start of Week)", "WeekSequenceNum", 2, 1),
#"Merged Queries Ultimate Table to WeekSequenceNum" = Table.NestedJoin(#"==Improve Ultimate Table",{"Date"},#"Added Index WeekSequenceNum",{"Date"},"Added Index WeekNum",JoinKind.LeftOuter),
#"Expanded Added Index WeekNum" = Table.ExpandTableColumn(#"Merged Queries Ultimate Table to WeekSequenceNum", "Added Index WeekNum", {"WeekSequenceNum"}, {"WeekSequenceNum"}),
// somehow it ends up being unsorted after Expand Column, should not matter for the end table, but makes it harder to debug and check everything is correct. Thus sorting it.
#"ReSorted Rows by Date" = Table.Sort(#"Expanded Added Index WeekNum",{{"Date", Order.Ascending}}),
#"Filled Down WeekSequenceNum" = Table.FillDown(#"ReSorted Rows by Date",{"WeekSequenceNum"}),
#"Replaced Value WeekSequenceNum null with 1" = Table.ReplaceValue(#"Filled Down WeekSequenceNum",null,1,Replacer.ReplaceValue,{"WeekSequenceNum"}),
#"Inserted Start of Week (WeekDate)" = Table.AddColumn(#"Replaced Value WeekSequenceNum null with 1", "WeekDate", each Date.StartOfWeek([Date]), type date),
// Updated Oct-2019
#"Inserted Week of Year" = Table.AddColumn(#"Inserted Start of Week (WeekDate)", "Week of Year", each Date.WeekOfYear([Date]), Int64.Type),
#"----WeekSequenceNum Complete----" = #"Inserted Week of Year",
Current_WeekSequenceNum = #"----WeekSequenceNum Complete----"{[Date = CurrentDate]}?[WeekSequenceNum],
#"Added Custom CurWeekOffset" = Table.AddColumn(#"----WeekSequenceNum Complete----", "CurWeekOffset", each [WeekSequenceNum] - Current_WeekSequenceNum, Int64.Type),
// Adding a DayofYear 1 to 365
// And YTD, QTD, MTD Columns (can help with showing YTD Numbers across multiple years)
#"==Updates 2019-Feb DayofYear and YTD QTD MTD Columns" = #"Added Custom CurWeekOffset",
// This maybe useful in some DAX Calculations
#"Inserted Day of Year" = Table.AddColumn(#"==Updates 2019-Feb DayofYear and YTD QTD MTD Columns", "Day of Year", each Date.DayOfYear([Date]), Int64.Type),
#"Added Flag_YTD" = Table.AddColumn(#"Inserted Day of Year", "Flag_YTD", each if Date.DayOfYear([Date]) <= Date.DayOfYear(CurrentDate)
then "YTD"
else null),
#"Added Flag_MTD" = Table.AddColumn(#"Added Flag_YTD", "Flag_MTD", each if Date.Day([Date]) <= Date.Day(CurrentDate)
then "MTD"
else null),
#"Added Flag_QTD" = Table.AddColumn(#"Added Flag_MTD", "Flag_QTD", each //Compare Month Number in Quarter (1,2,3) for [Date] and CurrentDate
if Number.Mod(Date.Month([Date])-1, 3) + 1
<= Number.Mod(Date.Month(CurrentDate)-1, 3) + 1
then "QTD"
else null),
#"==Update 2019-Mar CurrentDatOffset" = #"Added Flag_QTD",
#"Added CurrentDayOffset" = Table.AddColumn(#"==Update 2019-Mar CurrentDatOffset", "CurrentDayOffset", each [Date] - CurrentDate),
#"Changed Type1" = Table.TransformColumnTypes(#"Added CurrentDayOffset",{{"CurrentDayOffset", Int64.Type}, {"Date", type date}})
in
#"Changed Type1"
