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Dates
Summary

Instruction

Nice. We can also select some nonobvious information, like weekdays, which provides the day of the week (including Saturday and Sunday). Simply use the wday() function:

trucks$departure_weekday <- wday(trucks$departure_date)

Exercise

Use the wday() function on the departure_date column in the ships data set to create a new column, departure_weekday.

As you will see, this function returns a number between 1 and 7: 1 for Sunday, 2 for Monday, etc.