Starbucks faces significant backlash in South Korea following a promotional campaign timed for May 18. The coffee chain offered discounts on what they called "Tank Day," unaware of the date's historical significance in the country. The promotion triggered immediate criticism and potential customer boycotts.

May 18 marks the anniversary of the 1980 Gwangju massacre, a pivotal moment in South Korea's democratic movement when military forces violently suppressed pro-democracy protests. The date remains deeply sensitive for many South Koreans who remember the tragedy that claimed hundreds of lives.

The marketing misstep has damaged Starbucks' reputation in South Korea, its second-largest market globally. The company now faces potential revenue loss and long-term brand trust issues as customers express outrage over the insensitivity. This incident highlights the critical importance of cultural awareness in international marketing strategies.