On this day, seniors dress up in the craziest, Halloween-came-super-early costumes imaginable, and this year is no exception - the Ui-jung-bu high school kids are out to make us laugh to death.
In fact, the school's graduation photos are so popular online, that their hashtag #의정부고 is trending on Twitter in Korea.
Check out a few of the photos from this year's graduation photo day below.
'Produce 101's "Pick Me":
'Just Do It' from 'Mystery Music Show Mask King':
Kim Min Hee and Director Hong Sang Soo:
'Show Me The Money' judges/contestants:
Lee Byung Hun from 'Inside Men':
Poking fun at Yoochun's current sexual assault cases (From his former name Micky Yoochun + hinting at cases involving bathrooms):
Kang Dong Won from 'The Priests':
Which one is your favorite?