Choi Hong-hi
I was born in Korea on November 9, 1918. At that time, the Korean calendar was based on a lunar cycle, each month had 27 or 28 days. In the 1960s, Korea switched to the Western calendar, which is based on solar cycles, each month has 30 or 31 days. According to the Western calendar, my birth date is December 22. So although I have two birth dates, I chose to celebrate them on November 9, 1918.