Tableau works its magic with dates just based on date fields in a set. Power BI workbooks and Power BI designer would be super simplified if there was an inherent calendar built into the product based on setting a date column in a table as *the* Calendar date (the one you intend to group and set filter context in your Time Intelligence functions). This also eliminates the need to explain to analysts the variety of options for handling analysis and time intelligence functions on different dates (Order Date, Ship Date, Received Date).
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