It is incredibly rude to be late for a scheduled appointment. I understand the fact that some issues are unavoidable and occasionally, the reason for your delay is out of your hands. But those situations are rare. Most of the time, we’re late because we didn’t properly plan or prepare. The worst part of tardiness is the blatant disrespect for the person who’s waiting for you. Their time is just as valuable as yours. They made you a priority but you failed to make one of them.
Don’t be late. Add a little cushion of time in your schedule for the unavoidable delay. Whenever possible, be a little early. Prepare and plan properly and demonstrate to everyone that you are respectful and responsible.