1. Set up the separate prices for Early Bird Event pricing on your Raiser's Edge Event record.
2. In NetCommunity edit the Event Registration Form part.
3. Click Edit link next to the Event itself.
4. Scroll down to the "Event price options" section and then click the down arrow next to a ticket price option to expose the checkbox that will be labeled "Limit date availability" and click that checkbox.
5. You can then enter the desired Start & End Date and Times.