There are two structural facets when it comes to "time blindness," or, the non-linear perception of time that ADHD'ers experience. The first is external / environmental: If we don't see it, it doesn't exist! The second is internal / emotional: We vaguely know what time it is, but we're so ashamed about being late that we throw ourselves into nervous system dysregulation (flight), and it makes us EVEN MORE late. Listen to learn my approaches for both.