Returns the serial number of the date before or after a specified number of workdays.
| Name | Type | Description |
| arg1 | any | Is a serial date number that represents the start date. |
| arg2 | any | Is the number of nonweekend and non-holiday days before or after start_date. |
| arg3 | any | Is an optional array of one or more serial date numbers to exclude from the working calendar, such as state and federal holidays and floating holidays. |
builder.CreateFile("xlsx");
const oWorksheet = Api.GetActiveSheet();
var oFunction = Api.GetWorksheetFunction();
var ans = oFunction.WORKDAY("12/7/1981", 56);
oWorksheet.GetRange("C1").SetValue(ans);
builder.SaveFile("xlsx", "WORKDAY.xlsx");
builder.CloseFile();