The result is a date number that can be formatted as a date. You then see the date of a day that is a certain number of working days away from the start date.
WORKDAY(StartDate; Days [; Holidays])
StartDate is the date from which the calculation is carried out. If the start date is a working day, the day is included in the calculation.
Days is the number of working days. Positive value for a result after the start date, negative value for a result before the start date.
Holidays (optional) is a list of holidays. These are non-working days. Enter a cell range in which the holidays are listed individually.
What date came 17 working days after 1st December 2001? Enter the start date "2001-12-01" in C3 and the number of working days in D3. Cells F3 to J3 contain the following Christmas and New Year holidays: "2001-12-24", "2001-12-25", "2001-12-26", "2001-12-31", "2002-01-01".
=WORKDAY(C3;D3;F3:J3) returns 2001-12-28. Format the serial date number as a date, for example in the format YYYY-MM-DD.