The time in North Korea is GMT plus nine hours, exactly the same as in South Korea. Previously clocks in North Korea were set 30 minutes earlier to those in the South, with the change to Pyongyang time coming after the summit between Kim Jong-un and Moon Jae-in in early 2018.
You will also see years such as Juche 8 (1919) or Juche 99 (2011). Three years after the death of Kim Il-sung, the state adopted a new system of recording years, starting from Juche 1 (1912) when Kim No 1 was born. Despite the wide use of these dates internally, they are always clarified with ‘normal’ years.