Today in Korea is the KSAT. Dubbed the hardest test in the world. Good luck to you all

There is no test on this planet that is more difficult and more stressful than the KSAT.
Considered the most important test any student will take in Korea, the country celebrates and goes out of its way to help on this day.

Out in front of numerous high schools, 1st and 2nd year boys will stand shirtless cheering on those taking the tests
During the Korean and English listening portions of the test no planes will land or take off anywhere in the country
Afraid you may be late to the test? Don't worry. You call the local police department and they will provide you with a driver (police officer) to get you there on time
Traffic is curtailed, redirected and halted starting an hour before the test. (One year I was sitting on a bus, not moving for almost an hour because I had forgotten it was test day)
Elementary and middle schools start their days after 10, instead of at 9.
When we lived in Korea, our elementary school did not have the kids arrive until 10:30. The school was locked up so they didn't come early to keep noisy children off the street

The test is extremely difficult.
If you think it's an exaggeration, go to the Korean Englishman and watch the videos on British high school students, University students and adults trying to take the English portion of the test. And have fun watching native English speaking Brits look confused and feel stressed about a test that has no effect on them
Our oldest graduates in 2022-3. Fortunately, we're in Japan, so she's spared the test.
Again, best of luck to all the Korean 3rd year students (Seniors) taking their College Standardized Test. Hopefully you do well.