When you have ADHD, you often have tons of checklists for travel, because you also usually have a CRAP working memory.
You also end up doing a lot at the last minute, because we are doomed to be agents of chaos.
And you plan departure times in phases - what I referred to before we left as "intended departure time", "late departure time", and "OMGWTFBBQ" departure time. You aim for "intended" and more often than not get one of the latter two.