It's okay all u lonely souls celebrating the Korean #BlackDay today because u've got us! Eat ur #jajangmyeon proud: https://t.co/XaJPSre9Ld pic.twitter.com/NzZUss4wvk— Viki (@Viki) April 14, 2017
Happy Black Day from Coffee Prince! That's Valentine's Day on 14th of February, White Day on 14th of March and in Korea it's Black Day for the singles on 14th of April. And it looks like Koreans came up unofficial couple holidays for the whole year. Check it out on Matador Network.