North Korea is changing its time zone to match the South after last week's inter-Korean summit, according to its state media.
The country will move its clocks forward by 30 minutes on Saturday, said the official KCNA news agency.
The reset is "the first practical step" to "speed up the process for the North and the South to become one", it said.
Meanwhile, US President Donald Trump says he has a date for his meeting with the North's leader, Kim Jong-Un.
"We now have a date and we have a location, we'll be announcing it soon," Mr Trump told US journalists outside the White House on Friday, adding that he was expecting "very, very good things" to come out it.
What time does North Korea keep?
Until now, it was on Pyongyang Time, which is half an hour behind South Korea and Japan.
It introduced the extra 30 minutes in 2015 as a stand against "wicked Japanese imperialists", because its hours were changed to match Tokyo's when the Korean peninsula was under Japan's rule.
South Korea (which is nine hours ahead of GMT) had also moved away from Japanese time in the 1950s but it switched back again in the 1960s.
Two clocks - showing the time in North and South Korea - sit side by side in Panmunjom, the town in the so-called Demilitarized Zone (DMZ) where the two countries' leaders recently met.
After the talks, South Korea's presidency sent a tweet saying Mr Kim was distressed by seeing the clocks.