Weddings and funerals,
baby namings and rituals for the coming of age,
symbolic gestures to ease the transition into retirement
or to walk into a new life after a divorce...
There have always been rites of passage to acknowledge the transition towards a new stage in life. Even a funeral is meant to help the living move forward.
All these ceremonies have to do with your definition of the meaning of life and with the community of people you feel connected to. That is why religious institutions have often been in charge of social rituals.
Nowadays, many people define their lives individually and their community is really a network of relatives and friends.
That is why a ceremony will only be genuine if it is specifically designed for you.