In the Social27 platform, you can “lock” sessions to stop attendees from accessing sessions before their launch date and time. (This session is different from the Restrict Session feature.)
To customize lock session settings, log in to the Events Builder and select your event. Select General Settings from the left navigation menu, and click the Pages tab. Open the Sessions dropdown and enter Lock and Unlock times in the appropriate areas (times are measured in minutes). Click Save.
Once this feature is enabled, attendees will not have access to sessions until they are unlocked. If they click on a session that is currently locked, they will see a notification appear on the top left corner of their screen.