This function allows you to shift an event from day to day (or another interval).
As soon as the day is passed the event is moved to the next applicable date.
Currently the rolling is done on the device itself.
If you use more than one iOS device the rolling has to be stopped on the device where you created it.
In event edit mode, go to Repeat section and select Rolling at the bottom
Do not activate any repeat options above this switch, only modify Advance with below it.
In event details, activate the Completed button