Trans and non-binary or genderqueer people are people who are not content to remain the gender they were assigned at birth. They may identify within the gender binary of male or female (trans men and trans women, respectively) or outside of this binary system (genderqueer or non-binary people). Almost universally this involves a movement from the gender presentation commonly associated with the birth-assigned sex and towards a gender presentation which accords with the person’s internal gender identity. This process of transition occurs within the existential elements of the social world of being-with-others into which the person is thrown; and within the being-towards-death, or finitude, which is a part of being in time. The implications of this transition within a social world through time – and towards death – are explored.