North Korea's announcement that it is suspending nuclear and missile tests has received widespread international acclaim.
The North Korean leader said no further tests were needed, as the North has completed its program and now has nuclear weapons.
Donald Trump described the move as "good news" for the world, and South Korea said it was significant progress.
The European Union said it was "positive" news, but called for complete deconstruction. North Korea prepares for historic summits with South Korea and the United States.
Earlier on Saturday, Kim Jong Un said:
"From April 21, North Korea will stop nuclear tests and launch intercontinental ballistic missiles."
The surprise announcement, which was broadcast by the country's KCNA news agency, also said the test site would be closed.
Welcoming the US President, he said he was looking forward to a personal meeting with the North Korean leader in June.
They will meet with South Korean President Moon Jae-in next week for the first interparliamentary summit in more than a decade.
The South Korean leader's office said the North decision "will help create a very positive environment for the success of the forthcoming South-North Summit and the North-United States Summit."
EU foreign policy chief Federica Mogherini said it was a "long-awaited step" that should lead to "irreversible denuclearization".
An appeal from the United Kingdom as well. The British government statement added: "We hope this shows an effort to negotiate goodwill."
The United States and its allies are pushing Pyongyang to give up its nuclear weapons.
China, a key supporter of North Korea, said it believed the move would "help alleviate the situation on the peninsula".
Russia's foreign ministry welcomed the move, but called on the United States and South Korea to reduce their military activity in the region.