October 23 each year is observed significantly in Thailand as King Chalalongkorn Memorial Day. It marks the death anniversary of King Chalalongkorn,Rama V, the fifth monarch of the ruling House of Chakri. Recognized as one of the greatest leaders in Thai history and the world's great personalities,King Chalalongkorn carried out his life-long work for the betterment of his people's lives and the progress of the country.