Which tool would you use to extract the day of the week from a set of dates?

The Power Query editor is the correct choice for extracting the day of the week from a set of dates. Power Query is designed specifically for data manipulation and transformation tasks, allowing users to connect to various data sources, clean, reshape, and enrich data before loading it into the Power Platform applications, such as Power BI.

Within the Power Query editor, there are built-in functions that facilitate date and time manipulations, including the extraction of specific components such as the day of the week. Using the Power Query M language, you can apply transformations to your date values and easily derive the day of the week, whether it’s as a number (1 for Sunday through 7 for Saturday) or a text representation of the day (like "Monday", "Tuesday", etc.).

The other tools mentioned have different primary functions. The Navigator view allows users to preview and select data from data sources but does not provide manipulation capabilities. A New Measure is specifically for creating calculations in data models using DAX, which is more suitable for aggregating data rather than extracting components from date values. Similarly, a New Parameter is used to create dynamic inputs for reports or queries but does not manipulate date data directly. Thus, the Power Query editor is the most appropriate choice for this task