Setup: I need an early bird price
If your event pricing changes through time; i.e. early registrants receive a better price than later registrants, you can accomplish that by specifying the date range for registration types or priced items.
In the case shown above, you can see that the item identified as Regular Tuition is shown as 'Not available'.
This is because this item has a date restriction:
The item will show as Not available until January 27, 2010. On that date, the item will be shown as available.
The Early bird rate shown above also has a date restriction:
This item will show as not available after January 26th, 2010.
Check out the Early bird video: