Next Monday, it will be impossible to go to a Starbucks in South Korea after 3 p.m.... because all the employees will be taking a history class. On May 18, Starbucks in South Korea decided to broadcast an advertisement called “Tank Day” and offered for sale very large cups nicknamed “tank” because of their size. But this day, a public holiday in Korea, is dedicated to the Gwangju massacre. In 1980, hundreds of civilians were killed by the army.