North Korea has readjusted its time zone to match South Korea's, a sign of warming ties following a landmark summit between leaders of the rival nations.

North Korean leader Kim Jong Un promised to sync his country's time zone with the South's during his April 27 talks with South Korean President Moon Jae-in. A dispatch from the North's Korean Central News Agency says that promise was fulfilled Saturday.

The Koreas used the same time zone for decades before the North in 2015 created its own "Pyongyang Time" by setting its clocks 30 minutes behind South Korea and Japan.

KCNA earlier said Kim decided to switch back because it was "a painful wrench to see two clocks indicating Pyongyang and Seoul times hanging on a wall of the summit venue."