Date Table with Working Day / Weekend Flag in Power Query M

Adds a boolean column to a date table marking Saturdays and Sundays as non-working days.

Date & TimeBeginnerdate tableweekendworking daycalendar

Power Query M code

let
    Source = YourDateTable,
    AddedIsWeekend = Table.AddColumn(Source, "IsWeekend", each Date.DayOfWeek([Date], Day.Monday) >= 5, type logical),
    AddedIsWorkingDay = Table.AddColumn(AddedIsWeekend, "IsWorkingDay", each not [IsWeekend], type logical)
in
    AddedIsWorkingDay

Generate a date table in Power Query M

Notes

Replace YourDateTable and [Date] with your existing date table and its date column.

Requirements

How to use this snippet

  1. In Power BI Desktop, choose Transform data to open Power Query, then open the Advanced Editor on a query (or start from a blank query).
  2. Paste the snippet and replace the placeholder names (tables, columns, file paths) with your own. Check the requirements above first.
  3. Run it through the Power Query M Formatter to tidy the layout.

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