South Korean male citizens are required to enlist in the military between the ages of 18 and 28 — previously 18-35. Due to many speculations, if both 1991 and 1992 liners have to enlist in 2020,I did some research based on previous enlistments from 2019 and 2018. Based on those enlistments only idols born 1991 are required and must enlist in 2020 around their birthdays. Many idols born 1991 have already decided to enlist earlier in 2019 - Infinite Woohyun, U-KISS Hoon and Kiseop and etc. While those born 1991 must enlist in 2020 those who are born 1992 must enlist by their birthdays in 2021 or if they decide they can do it earlier like EXO D.O(born 1993)who originally was supposed to enlist 2022 but decided to follow fellow member Xiumin(born 1990) to enlist earlier. Both EXO members are said to be discharged by December 2020 and January 2021. Here is the shortlist of the remaining idols who must enlist in 2020:

1. EXO Suho - Birthday: May 22, 1991

2. F.T. Island’s Jaejin - Birthday: December 17, 1991

3. WINNER’s Jinwoo - September 26, 1991