Step one: Login to your Editor's Back Office.
Step Two: On the right side of your calendar, click the white settings dropdown button.
Step three: Click "Edit site settings".
Step four: This will take you to the page where you can add in moderation.
Step five: Scroll down to the "Calendar" section and you'll see the options to moderate events.
Step six: Tick the box by "Moderate events" and add the time delay you'd like under "Moderation delay (in hours)".
Step seven: Once you've filled in your desired delay, scroll to the bottom right of the page and click "update publisher".
In moderation is now updated for your calendar. Remember to review the events within the timeframe you selected and the events will become live after the moderation delay.