Unfortunately no such traditions exist for those with secular orientation. But since tradition and ritual are integral to culture, it is necessary for metaculture to develop traditions and rituals that can reinforce modern values like freedom, reason, [[science], equality, etc.
Throughout history, the traditions of one culture have been coopted and repurposed by the next. Saturnalia becomes Christmas once the Roman Empire becomes a Christian state. This makes sense from a psychological perspective since it is much easier to redirect an existing habit than to form a new one from nothing. Christmas has already been coopted again by the god of capitalism, and as such it should be embraced. Rather than being a selfish perversion of the teachings of Jesus, it can be a joyous celebration of all the wonderful stuff that capitalism is so good at producing. This is simply acknowledging the evolution in meaning that the Christmas holiday has already undergone.
And this is the nature of rituals. They evolve and change their meaning with the tide of history. Old traditions become new by taking on new meaning imbued by future generations. Rarely are they simply made up out of whole cloth, and when they are it's more likely to become a cult than a religion.
A fully fledged religion needs to have
- A god
- A creation story
- Cultural history
- A system of ethics
- Rituals to celebrate life's milestones like birth, coming of age, marriage and death
- A narrative that provides meaning, context, and easy transmission of a culture's most critical beliefs