This is a nice enough study but those commenting here surprised so many people see the year as a circle didn't read the article carefully enough:
> I asked our readers: "If the year is a circle – where’s March and December in your mind?"
The purpose of this study wasn't to find out if people see the year circularly or linearly - the circle was built in as a prior assumption.
I have zero data but I'd be shocked if most people don't view the year linearly.