The 'type' of program it is impacts how far ahead in their calendar clients can see content.
For Session 1 Day 1 programs the setting is locked at 7 days ahead, rolling one day more per day, in order to protect coaches from clients accessing content they've not yet paid for. This is because each client can, and often is, be at various stages of the same program.
A Fixed Length program grants clients access to the whole schedule.
However, with Group Rolling Calendars and 1-2-1 programs a coach can decide the setting.