# Annual Timeslot Prolongation
The **Annual Timeslot Prolongation** is run once a year in order to extend the complete program
schedule with new timeslots for the next year.
When a schedule is created, the system automatically generates timeslots according to the defined
recurrence rule.
If the schedule has no end date, these timeslots are generated only until the end of the current
calendar year. Therefore, a timeslot prolongation is required at year-end to extend the
schedule into the next year.
## Prolongation interface
To access the annual prolongation interface, navigate to **prolongation** in the sidebar.
By default, the prolongation uses the duration of the upcoming calendar year as its basis.
Alternatively, the system can apply a prolongation period derived from the schedule’s start date
plus a defined number of days. This behavior is configurable only by administrators and requires
a service restart to take effect.
For details, see the section "_Change the way timeslots for schedules are created_" in the
[Administration Guide > Update and Maintain](../../administration/update-and-maintain.md) section.
## Starting annual prolongation
Click **Prolong until _\_** to start the prolongation process.
Use **caution** when initiating the prolongation job, as **it cannot be easily reversed**.
The operation may take some time to complete. You can continue working on other tasks while it runs and return to this view later.
## Solving individual conflicts
Once the job finishes, a **list of conflicting show schedules** is displayed. These conflicts occur when newly generated timeslots overlap with existing schedule timeslots.
To finalize the prolongation, each conflict must be resolved manually. The resolution workflow is the same as in the standard **collision detection interface**. For details, refer to the [_Timeslot Collision Detection_](../timeslot-collision-detection.md) section.
Open conflicts are hinted with **warning icon** the sidebar navigation.
## Related
- [Conflict Resolution Log](conflict-resolution-log.md)