| Name | Type | Options | Opt/Req | Description |
| dateIn | D | Const | Req | The date to be chaged. |
| type | 1A | Const | Req | 'D' to change the day; 'M' to change the month; 'Y' to change the year. |
| value | 4,0 | Const | Req | The value to change the date subfield to. |
| Returns: | D | n/a | n/a | The changed Date field. |