When creating a new PI Planning session in general information page, you can set the following fields.
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Name
Description
Start date of your PI Planning
The date when PI Planning will take place. Can be edited also after session is created. The date is then displayed in the PI planning app when selecting a session from session list.
Number of Iterations
max. 12
Duration of one Iteration in Days
This includes days on weekend. Based on the amount of days the dates under step 9 Iterations will be automatically filled in.