My sense of time is extremely weak. I usually have no idea what the time of day is unless I deliberately watch where the sun is in the sky. I may go for a walk and lose track of time completely, so that I end up thinking that I spent most of the day out in the city, and then discover, with surprise, that it was just a couple of hours. Coming somewhere on time is difficult. It's hard to guess how much time I need to spend on the journey in order to arrive at the necessary hour, so I'm almost always either early or late (more often than not, it's late).
It's as if the points on the clock face or the numbers on the calendar somehow didn't coincide with the actual time they are supposed to measure. I know they are there, formally, but they don't have much meaning. I think this is part of why I am so disorganized - I simply have no concept of what it means (internally) to do something "at a certain time", because my own time stands still.
It's by far not as bad as some people report, though, apparently some autistics too. I remember reading "The Special Childhood", - the place where Johansson describes how she was never able to come on time (or didn't turn up at all) until she was forty-something, and had to tell the seasons by watching the weather or the way the leaves changed because she had no natural sense of them, - and thinking that compared to her I do have a sense of time.