Forum topic: being on time

This is the first time I write. My husband has adhd and I don't. We have been seeing a couple's therapist and it is going alright. He admits he has adhd, but he says it is minor and only affects his ability to focus. I think it is more than minor. It affects his organization and planning skills, his irritability and ways he lashes out.  Lately I have been very annoyed at the way he does not keep time in mind. He says I am intolerable of any time delay with him. He might be right, I think it happens so often that have become intolerable. We are both retired and at home and i am the one that plans meals, although he is happy to help. An example that happens often is that he might say he is going to help at X time to prepare lunch. X time comes and he is not there. Sometimes it is 15 min, sometimes is 30 min. I know I could just ask him to be in the kitchen earlier but he is just inconsistent. There is always something that interferes with him being on time and the amount of time delays are never the same. It annoys me because he is very punctual and even arrives early when he goes to his music gigs (he has a passion for music) so he definitely can do it.  As I write this appears to me that this is such minor thing but I feel my time is important too and he might think is not because I am usually here. What can I do to help us?