In the example shown, the formula in F8 is: The first expression tests every holiday date to see if it’s greater than or equal to the start date in F5: This returns an array of TRUE/FALSE values like this: {FALSE;FALSE;FALSE;FALSE;TRUE;TRUE;TRUE;TRUE;TRUE} The second expression tests every holiday date to see if it’s less than or equal to the end date in F6: which returns an array of TRUE/FALSE values like this: {TRUE;TRUE;TRUE;TRUE;TRUE;TRUE;TRUE;TRUE;FALSE} The multiplication of these two arrays automatically coerces the TRUE/FALSE values to ones and zeros, resulting in arrays that look like this: After multiplication, we have just one array like this: Finally, SUMPRODUCT sums the items in the array and returns 4.
Holidays on weekdays only
To count holidays that occur on weekdays only (Mon-Fri), you can extend the formula like this: where rng is a range containing holiday dates.
Dave Bruns
Hi - I’m Dave Bruns, and I run Exceljet with my wife, Lisa. Our goal is to help you work faster in Excel. We create short videos, and clear examples of formulas, functions, pivot tables, conditional formatting, and charts.
