youbi
| Explanation | Returns the day number of the date represented by date. | |
| Call format | var d = youbi( date ) | |
| Return value | The day numbers are as follows. 0: Mon 1: Tue 2: Wed 3: Thu 4: Fri 5: Sat 6: Sun | |
| Arguments | Date date | Date object to retrieve the day of the week |
| Exception | None | |
| Example of use | | |
| Related item | year, month, day methods | |