Sign in to a PlayerFirst website.
On the left navigation, click Program > Registration Details.
Click the Pencil Program icon next to your desired program.
Click Registration in the sub navigation.
List Publicly: Click the checkbox.
Start Showing on Website: Set the date and time for when the program should start showing on the website.
Click Save Program.
See also How to Create a Program that Requires an Access Code and How to Make a Private Program.