Returns the day of the date given in the numerical format, a number from 1 to 31.
| Name | Type | Description |
| arg1 | number | A number in the date-time code. |
builder.CreateFile("xlsx");
const oWorksheet = Api.GetActiveSheet();
var oFunction = Api.GetWorksheetFunction();
var ans = oFunction.DAY("2018/3/16");
oWorksheet.GetRange("C1").SetValue(ans);
builder.SaveFile("xlsx", "DAY.xlsx");
builder.CloseFile();