Hyeonjong (Korean: 현종; Hanja: 顯宗; 14 March 1641 – 17 September 1674), personal name Yi Yeon (이연; 李棩), was the 18th monarch of the Joseon of Korea.

The Westerners, headed by Song Si-yeol, contended that she needed to wear the funeral garment for only a year, while the Southerners and their leader Heo Jeok wanted a 3-year period.

The Westerners wanted to follow the custom for a second stepson, while the Southerners thought Hyojong deserved a 3-year funeral since he actually succeeded King Injo in the royal line.

However, at the same time, Hyeonjong did not remove Heo Jeok from office of Prime Minister, in order to prevent the Westerners from threatening royal authority.

The controversy even affected the publishing of official history of Hyeonjong's era; at first it was written chiefly by Southerners but later it was revised by Westerner historians.

Hyeonjong stopped Hyojong's insuperable plan of northern conquest since Joseon had become a tributary state of the Qing Dynasty.