The two Koreas communicated under their unified time zone for the first time in nearly three years on Tuesday. 

An official at South Korea's Unification Ministry said the North called the South through their liaison office at the truce village of Panmunjeom at 9:03 a.m. Tuesday to start the day's operations.

The official added that the abnormal operation of the liaison office since August 2015, from the difference in standard times between the two sides has ended.

North Korea decided to push back its standard time by 30 minutes, claiming the move was aimed at removing what is left from Japan's colonial rule of the Korean Peninsula.

North Korean leader Kim Jong-un proposed synching the two clocks during a summit with President Moon Jae-in last month.

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