Due Date (1) field can be completed in 3 ways:
- Fixed (2): here you can enter a specific value you want to enter in the due date field.
- Dynamic (3): that way add specified value to the current date. For example if you set "1d" in field, due date will be set on next day after the creation. Or in case "1w", it will be next week.
- Next Execution Time (4): In this case due date will be set to date when the scheduler will be run this Scheduled Job again.
This field is located on the second screen (5) of creation/edition form (available to get here on the "Set Issue Details" screen). It is present by default in all Jira Business (not Software) default projects.