1. Log in to your Website Toolbox account.
2. Click the Calendars link. If you don't see a Calendars link, enable the calendar first.
3. Click the Manage link next to the calender title, under the Calendar Manager tab.
4. Select Edit from the drop down.
5. Select/Deselect the option which says Require approval of events.
6. Save the settings.

Event approval is also configurable on a per user group basis. A user's posts will only need approval if they are part of a user group that has the Require event approval option activated. You can edit a user group to toggle that option.