To add new templates use the Template creator. Once created, users can use this template by selecting it from the '+' drop-down in the Gantt module. When one of the tasks is selected, its start date becomes a reference point for all the tasks in the template.
For example: Eve created a template with three sample tasks:
The PP-98 starts on the September 2nd and the tasks will be added the +1d, +5d and +9d respectively. As the Task 2 would start on a non-working day, it was moved by the scheduling mechanism to start on the first available working day: