Hangŭl Day (한글날)

I wonder why I didn't hear about this earlier. It's not like I don't talk to a certain Korean every day, but oh well. Found this over at Language Log:

Today, October 9th, is Hangul Day (한글날), the celebration of the promulgation of the Korean alphabet Hangul 한글 by King Sejong the Great in 1446.

King Sejong (세종대왕 in Hangul, 世宗大王 in Chinese characters), the fourth king of the Choson dynasty, was born May 6, 1397 and ascended the throne in 1418 at the age of 21. He died May 18, 1450 aged only 53. He is known for his work improving Korea's defenses against Japanese pirates and invaders from Manchuria, for his patronage of scholarship (among other things, he founded the 집현전 集賢殿 (Jiphyeonjeon) or "Hall of Worthies", a kind of royal academy) and for his own scholarly work. He is credited with the invention of a rain gauge, a water clock, and a sundial. His literary works include the highly regarded Yongbi Eocheon Ga "Songs of Flying Dragons", Worin Cheon-gang Jigok "Songs of the Moon Shining on a Thousand Rivers", and Seokbo Sangjeol "Episodes from the Life of the Buddha". He also compiled the Dongguk Jeong-un "Dictionary of Proper Sino-Korean Pronunciation". Most of all, he is known as the creator and promulgator of Hangul.

Prior to 1446, the Korean language was rarely written at all. The written language used in Korea was Classical Chinese. The combination of the use of a foreign language with the large amount of memorization required to learn thousands of Chinese characters meant that only a small elite were literate, overwhelmingly men from aristocratic families. The great majority of people were illiterate. On the relatively rare occasions when Korean was written, it was written using Chinese characters, in part for their sound, in part for their meaning. This too was a complex system poorly suited for mass literacy. Hangul was the first writing system to make it easy for any Korean to read and write his or her native language.

Unilang forums also has a good post on Hangŭl Day.

EDIT: I removed my disagreement with LL. Thinking it over - rules would negate ambiguity, as long as they're consistent, and they are. So happy Hangŭl Day everybody!

BTW - anyone know of any good Korean grammars?