How to create a calculation to find the day of week for a specific date, similar to the weekday() function in Excel to returns the day of the week corresponding to a date.
Option 1. use ISOWEEKDAY ([date_field_name]) to get as an integer
For more information, https://help.tableau.com/current/pro/desktop/en-us/functions_functions_date.htm#isoweekday
Option 2. use DATENAME("weekday",[date_field_name]) to get day as a string
For more information, https://help.tableau.com/current/pro/desktop/en-us/functions_functions_date.htm#datename
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