North Korea to shift time zone from GMT+8.5 to GMT+9 from May 6

KOREA D.P.R.  As widely reported on the inter-Korean summit on 27 April Kim Jong-un
said he would move North Korea back to the GMT+9 time zone, the same as South Korea
and Japan. North Korea only moved to GMT+8.5 in 2015. The change will make the time
of Voice of Korea broadcasts 30 minutes earlier according to GMT. The transmissions
of Voice of Korea will be changed from 0330-0020 to 0300-2350UTC. More info is here