customary

This word carries a sense of social expectation and collective agreement. It describes behaviors that are not necessarily mandated by law but are governed by an unwritten social contract. Using it suggests a feeling of stability and predictability within a culture or a specific group. When applied to an individual, it shifts from social tradition to personal habit. In this sense, it implies a ritualistic quality to a person's routine, suggesting that the action is so ingrained that it has become a signature characteristic of their behavior.