I think the thing about a perfect day is it would need to take me by surprise/contain a few (nice) surprises. if it's scripted/predicted/pondered, it's no longer perfect.
it would definitely involve cuddles with my family, laughter, being outdoors in nice weather -but that could be playing iin the fall leaves, swimming in a warm lake, sledding in deep snow.....) and probably also being indoors watching an amazing thunderstorm once I was all done with being outside.... and it would need to containd some unique element that I could identify it by. like my house miraculously being tidied and sorted exactly the way i want it even though i don't yet know what that is..... or there being no other vehicles on the roads AT ALL... but not too many of these miracles or i'd spend the whole day waiting for the other shoe to drop rather than enjoying it....
It definitely would
not involve shopping of any sort, medical issues, illness, paperwork, phonecalls, commercials, other people's children, dogs, Lite beer of any variety, religion, curry, american football (

), birds that have become not interesting, mouthbreathers or country music.