2.1.1066 Part 1 Section 18.17.7.347, WORKDAY

a.   The standard states that #NUM! is returned if any date in argument holidays is out of range for the current date base value.

Office returns #VALUE! if any date in argument holidays is out of range for the current date base value.

b.   The standard does not declare which days are weekend days.

In Office the function considers Saturday and Sunday to be the weekend days.

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