In May 2018, North Korea changed its time zone to match that of what other country or city?

Question

Answer 1

South Korea
The change was made after the meeting between the presidents of both countries in April 2018 to pursue peace possibilities. The existing "Pyongyang Time" in North Korea had been established in 2015, to distinguish it from Tokyo Time, mandated by Japan during its annexation of the Korean Peninsula from 1910 to 1945.