I'm Korean.
My english isn't good enough to write an entire article, but I'd like to contribute to correcting the pages about Korea.
Wikipedia:Naming conventions (Korean)
... Contents 242 Centuries: 2nd century - 3rd century - 4th century Decades: 190s 200s 210s 220s 230s - 240s - 250s 260s 270s 280s 290s Years: 237 238 239 ...