In South Korea, April 14 is called Black Day, an unofficial occasion for singles who received no gifts on Valentine's Day or White Day. Participants often meet friends, wear black, and eat jajangmyeon, noodles covered in black-bean sauce.
The date follows two earlier gift-giving holidays. Valentine's Day falls on February 14, when women traditionally give chocolate or gifts to men, while White Day on March 14 is traditionally associated with men's return gifts. Black Day provides a humorous counterpart for people left out of those exchanges.
Black Day is not a national public holiday in the usual legal sense. It is part of South Korea's wider “day marketing” culture, in which businesses promote themed events, discounts, food, matchmaking, and social gatherings around recurring calendar dates.