How to say seasons in Korean ? What is December in Korean? Do you know how to say seasons in Korean? Did you know Korean people use two difference number counting systems? There is Native Korean and Sino-Korean number system. For the month naming, South Korea uses Sino-Korean number system like 일,이,삼,사 and etc,. Vocabulary & Pronunciation The four seasons are called: 여름 - Summer 가을 - Autumn 겨울 -..