DayOfWeekAsString(day_of_week)
Returns the day of the week corresponding to day_of_week, an integer ranging from 1 (Sunday) to 7 (Saturday).
See also Day, DayOfWeek, DayOfYear, DaysInMonth, DaysInYear, and FirstDayOfMonth.
Integer representing the day of the week, where 1 is Sunday, 2 is Monday, and so on.
Years less than 100 are interpreted as 20th century values.