By default, a campaign has over fifteen types of entities enabled. If your world has no use of calendars or quests, these can be disabled.
From the campaign sidebar, click on World, and then go to the Modules subpage. This interface allows you to enable or disable types of entities that the campaign doesn’t need.
Disabling an entity type doesn’t delete the related data from the campaign. Instead, it is simply hidden. Only members of the campaign’s admin role can enable or disable modules.
Modules enabled by default