Forgetting something that genuinely mattered to your kid
ADHD parent behaviour
What to do right now
You forgot something they were counting on. The disappointment is real and the impact on your relationship is real. Don't minimise it or over-explain it. One sentence: "I forgot. I'm really sorry. That mattered to you and I should have remembered it." Then figure out if there's anything you can do now, and if there isn't — sit with them in the disappointment rather than away from it.
What your brain just did
Your body
The guilt is specific and sharp. You forgot something that genuinely mattered to your child. Not because you didn't care. Because it fell out of working memory before you could act.
Your brain
ADHD working memory holds fewer items for shorter durations. Parenting has an enormous invisible overhead of dates, commitments, routines, consequences. Most of them live in working memory, which is exactly where ADHD is weakest.
What this did
One external anchor for one thing is more reliable than promising to remember. Write it where you'll see it. Not on your phone. Physically visible in the space where you'll need it.