When did South Korea change its name from "South Korea" to "South Korea"?

In 1896, Emperor Gaozong of Joseon "upgraded" to the puppet regime of the Korean Empire with the support of Russia. From then on, the name of Lee's Joseon was changed to "Han".

Extended information:

The Republic of Korea (Korean:, English: Republic of Korea), referred to as "South Korea". It is located in the southern part of the Korean Peninsula in East Asia, with a total area of ??about 10 million square kilometers (accounting for 45% of the area of ??the Korean Peninsula). The main ethnic group is Korean, Korean is commonly spoken, and the total population is about 51450,000. The capital is Seoul.

South Korea is surrounded by the sea on three sides, with the Yellow Sea to the west, the Korean Strait to the southeast, the Sea of ??Japan to the east, and North Korea across the 38th Parallel Demilitarized Zone to the north.

In August and September 1948, along the 38th parallel, the north and south of the Korean Peninsula established the Republic of Korea and the Democratic People's Republic of Korea. The Korean War broke out in 1950, ??and on July 27, 1953, in accordance with the Korean Armistice Agreement, North Korea and South Korea ceased fighting.

Since the 1960s, the Korean government has implemented an "export-led" economic development strategy, created a period of rapid economic growth known as the "Han River Miracle", and ranked among the "Four Asian Tigers".

References:

Baidu Encyclopedia-South Korea