It appears that 2019 is the timeframe that the Moon administration will push to get a freeze deal agreed to with North Korea:
South Korea should push for a summit between President Moon Jae-in and North Korean leader Kim Jong-un in the first half of Moon’s term, a senior ruling party lawmaker said Thursday.
Rep. Lee Hae-chan of the Democratic Party made the suggestion in a speech set to be delivered at a security conference, saying 2019 will be good for a summit because the year is meaningful as the 100th anniversary of the 1919 nationwide uprising against Japanese colonial rule and the establishment of a provisional government.
“If possible, it’s important to push for a South-North summit in the first half (of Moon’s five-year term),” Lee said during the conference organized to mark late former President Kim Dae-jung’s winning of the 2000 Nobel Peace Prize following the first inter-Korean summit ever earlier that year.
“If a summit takes places in the second half, it would be difficult to guarantee its effectiveness,” he said. [Korea Times]
That last sentence leads me to believe that the Moon administration has little confidence that what they have planned will be popular enough with voters to elect another liberal President to follow through with whatever is agreed to at this summit.