Science Marches On: We Now Have a Yard Sale That Runs Backward In Time

A sentence to ponder:

The world’s longest yard sale runs for nearly 700 miles along a mostly vertical line connecting Alabama and Michigan, from the first Thursday in August through the first Sunday.

But what if the first Sunday comes before the first Thursday? Do they cancel the sale that year? Does it run backward through time? I demand answers.

(Via Tyler Cowen.)