You can set up early bird pricing during the creation or addition of a new event, or after its creation by editing it.
To set up early-bird pricing, follow these steps:
Go to Step 2 - Pricing & Registration during the creation of a new event or by accessing an already created event. From the main, top navigation menu you can access this by selecting Classes.
Once there, check the box labelled Enable early-bird pricing. You will now get options to fill in the early-bird price and date, up to and including which, the early-bird price will be in effect for.
Be sure to accurately set up your event pricing before you start getting registrations.