The days displayed to partipants in the event, via the agenda calendar, are by default those situated between the start and end date of the event (as specified in the workspace settings).
As such, if there are any sessions that are scheduled outside of the start and end dates of the event, they will not be displayed.
A setting called Custom date range is available in Content → Sessions → Preferences → Agenda calendar:
When to use this?
This setting can be used to enter a custom date range for the agenda calendar, to include any sessions in the agenda calendar that are scheduled outside of the event start to end date range.
It is also helpful for long running events where you only want to show the days in the calendar that have sessions scheduled.
Important: If you are unsure on whether you should use this setting or not, we recommend that you reach out to SpotMe support for guidance.