The result is a date number that can be formatted as a date. User can see the date of a day that is a certain number of workdays away from the start date (before or after). There are options to define weekend days and holidays. The optional weekend parameter (or a string) can be used to define the weekend days (or the non-working days in each week). Also, optionally, the user can define a holiday list. The weekend days and user-defined holidays are not counted as working days.


WORKDAY.INTL(StartDate; Days; Weekend; Holidays)

StartDate is the date from when the calculation is carried out. If the start date is a workday, the day is included in the calculation. This is required.

Days is the number of workdays. Positive value for a result after the start date, negative value for a result before the start date.

Weekend is an optional parameter – a number or a string used to specify the days of the week that are weekend days and are not considered working days. Weekend is a weekend number or string that specifies when weekends occur. Weekend number values indicate the following weekend days:

Number 1 to 7 for two-day weekends and 11 to 17 for one-day weekends.



1 or omitted

Saturday and Sunday


Sunday and Monday


Monday and Tuesday


Tuesday and Wednesday


Wednesday and Thursday


Thursday and Friday


Friday and Saturday


Sunday only


Monday only


Tuesday only


Wednesday only


Thursday only


Friday only


Saturday only

Weekend string provides another way to define the weekly non-working days. It must have seven (7) characters – zeros (0) for working day and ones (1) for non-working day. Each character represents a day of the week, starting with Monday. Only 1 and 0 are valid. “1111111” is an invalid string and should not be used. For example, the weekend string “0000011” defines Saturday and Sunday as non-working days.

Holidays is an optional list of dates that must be counted as non-working days. The list can be given in a cell range.


What date comes 20 workdays after December 13, 2016? Enter the start date in C3 and the number of workdays in D3.

The weekend parameter (number) may be left blank or defined as 1 for default weekend (non-working days) – Saturday and Sunday.

Cells F3 to J3 contain five (5) holidays for Christmas and New Year in date format: December 24, 2016; December 25, 2016; December 26, 2016; December 31, 2016; and January 1, 2017.

=WORKDAY.INTL(C3;D3;;F3:J3) returns January 11, 2017 in the result cell, say D6 (use date format for the cell).

To define Friday and Saturday as weekend days, use the weekend parameter 7.

=WORKDAY.INTL(C3;D3;7;F3:J3) returns January 15, 2017 with weekend parameter 7.

To define Sunday only the weekend day, use the weekend parameter 11.

=WORKDAY.INTL(C3;D3;11;F3:J3) returns January 9, 2017.

Alternatively, use the weekend string "0000001" for Sunday only weekend.

=WORKDAY.INTL(C3;D3;"0000001";F3:J3) returns January 9, 2017.

The function can be used without the two optional parameters – Weekday and Holidays – by leaving them out:

=WORKDAY.INTL(C3;D3) gives the result: January 10, 2017.