Luxembourg National Day is celebrated every year on June 23 to mark the official birthday of the ruler of Luxembourg. Did you know that Luxembourg was a part of the ancient Roman Empire and produced several Holy Roman Emperors? National Day of Luxembourg is usually a festive day in the city of Luxembourg. The celebration starts with a change of the guard at the Grand-Ducal palace on June 22, then a torchlight procession, open-air concerts, and fireworks. National Day of Luxembourg kickstarts with an official ceremony, a gun salute, a military parade, and the traditional Te Deum at the cathedral Notre Dame.
Memorial Day in South Korea

Memorial Day in South Korea is observed annually on June 6. This day was set aside by the South Korean government in honor of the brave soldiers who lost their lives fighting in the Korean war, and other significant wars of the federation. It is a public holiday observed by the entire nation in reverence of the lost souls.
International Day for the Fight against Illegal Unreported and Unregulated Fishing

The International Day for the Fight Against Illegal Unreported and Unregulated (I.U.U.) Fishing is observed on June 5. The purpose behind this annual day is to make people aware of the threats posed by I.U.U. fishing to the marine ecosystem. In the past decades, world fish stocks have deteriorated extensively due to I.U.U. fishing as well as legal fishing practices. This is affecting marine life and biodiversity. It also threatens the livelihood of coastal communities and the climate. To counter this, the U.N. General Assembly created a dedicated day to fight against I.U.U. fishing and promote sustainable fishing practices.