I highly doubt a single person created the wheel out of nothing. The idea of a circle is part of our innate biology we are hard wired to recognize or create circular shapes.

Most likely several people tried to create the wheel and ideas on what to do with a circular shape were thought of, some cross pollination from physics resulted in it being used for transportation.

So I’d argue it was not done on a sunny day but mostly as an obsession just like most every other game changing idea