Conservative Christian teens have the Silver Ring Thing.
What do non-religious people have?
How about a Secular Principles Pinky Swear? It was started by a group of young humanist activists from Georgia:
I strive to live my life according to progressive, secular values, not dogma or superstition. Therefore, because the conservative religious community promotes pledges of abstinence and religious obedience, I want to demonstrate that I am committed to legitimate and ethical secular principles. I commit to living by my humanist principles so long as those convictions are central to my worldview.
There’s also a list of seven principles, including:
Here’s a bit more info:
I will be open about my secular values and will not feign religious values due to pressure from friends, family, employers and/or the general public.
And who knew you could pinky swear online? Only 53 people have done it so far. Let’s increase that number, yes?