The Korean flag, as promulgated by royal order, is approximately 141 years old as of October 26, 2024.
Explanation:
The Korean flag, known as Taegeukgi, was first used on September 25, 1882, according to a report by Park Yeong-hyo to the government. King Gojong officially promulgated Taegeukgi as the national flag on March 6, 1883. Therefore, calculating from March 6, 1883, to October 26, 2024, we find that the flag is approximately 141 years old.