Returns the month, a number from 1 (January) to 12 (December)..
| Name | Type | Description |
| arg1 | number | Is a number in the date-time code used by Microsoft Excel. |
builder.CreateFile("xlsx");
const oWorksheet = Api.GetActiveSheet();
var oFunction = Api.GetWorksheetFunction();
var ans = oFunction.MONTH("3/16/2018");
oWorksheet.GetRange("C1").SetValue(ans);
builder.SaveFile("xlsx", "MONTH.xlsx");
builder.CloseFile();