All over the country, airports have been shut down so they don't make plane noise. Reason? Unimaginable in Poland

In South Korea air traffic was halted for respective twelve minutes, the beginning of the stock exchange, banks and offices was delayed. Not due to the alarm or crisis, but due to the exam. More than half a million students took the most crucial test of their lives: Suneung, or the entrance exam for college. This event, which virtually stops the full country all year.