Creates a new DateTime adding the specified values to the current date and time in this.
Add negative values to subtract.
| this |
a DateTime |
| years |
the number of years to add |
| months |
the number of months to add |
| days |
the number of days to add |
| hours |
the number of hours to add |
| minutes |
the number of minutes to add |
| seconds |
the number of seconds to add |
|
the newly created DateTime that should be freed with |