| Name | Type | Options | Opt/Req | Description |
| dateIn | D | Const | Opt | The date. If not sent then %date() is used. |
| verbose | N | Const | Opt | Determines whether or not to return the full name (*ON) vs. the 3 letter abbreviation (*OFF). If not sent then verbose is *ON. |
| format | 5A | Const | Opt | 'upper' returns name in all upper case; 'lower' returns name in all lower case; 'mixed' returns name in mixed case. If not sent then 'upper' is default. |
| Returns: | 10A | Varying | n/a | The day name or abbreviated code. |