description:
| Returns the serial number of the date before or after a specified number of workdays with custom weekend parameters. |
syntax:
| =WORKDAY.INTL( start_date, days, [weekend], [holidays] ) |
required arguments:
| start_date | A start date. |
| days | The working days before or after start_date. |
optional arguments:
| [weekend] | A list of non-working days. |
| [holdays] | A list of dates that should be considered non-working days. |
