Question: What date did North Korea say that it's not following the North-South declaration on non-aggression?
About the article "Korean War", section "Division of Korea (1954–present)".

Candidate passages:
  North Korea confirmed it ended the 1953 Korean Armistice Agreement, declaring that North Korea "is not restrained by the North-South declaration on non-aggression" and warned that the next step was an act of "merciless" military retaliation against its enemies.  
On 7 March 2013, North Korea announced its intentions to launch a preemptive nuclear strike against the United States.
The statement called the United States, the "sworn enemy of the Korean people".
On 8 March 2013, the North Korean government announced that it was withdrawing from all non-aggression pacts with South Korea in response to U.N.
Resolution 2094.
The announcement said it was closing its joint border crossing with South Korea and cutting off the hotline to the South.
On 13 March 2013, North Korea confirmed it ended the 1953 Armistice and declared North Korea "is not restrained by the North-South declaration on non-aggression.
Confirmation of the severing of the hotline between the North and the South—the last remaining communication link between the two countries at that time—was publicly announced on March 27, 2013, the same date that the hotline was cut off.
According to the Korean Central News Agency, a senior North Korean military official stated: "Under the situation where a war may break out any moment, there is no need to keep up North-South military communications" prior to the cessation of the communication channel.
On 30 March 2013, the North Korean government declared it was in 'a state of war' with South Korea.
A North Korean statement promised "stern physical actions" against "any provocative act".
The North Korean leader Kim Jong-un declared that rockets were ready to be fired at American bases in the Pacific in response to the U.S. flying two nuclear-capable B2 stealth bombers over the Korean peninsula.
The United States warned North Korea that the rapidly escalating military confrontation would lead to further isolation, as The Pentagon declared that the U.S. was "fully capable" of defending itself and its allies against a missile attack.
On 4 April 2013 North Korea's state news agency KCNA announced "The moment of explosion is approaching fast.
No one can say a war will break out in Korea or not and whether it will break out today or tomorrow."U.S.
National Intelligence Director James Clapper speculated that Kim Jong-un is trying to assert his control over North Korea, and has no endgame other than gaining recognition; analysts and other U.S. officials have echoed similar sentiments.
Four missile launches were conducted on May 18 and 19, 2013—according to South Korea's defense ministry, three short-range guided missiles landed into the waters off the Korean peninsula on May 18, followed by a fourth on May 19.
The missiles did not put any neighboring nations at risk and Pyongyang's actions were widely viewed as an exercise in fear creation to prompt other countries to consider security and aid concessions.
The launches occurred during a period when relations were strained between the North and the South, as Pyongyang refused to participate in talks over the closed Kaesong plant.
At the start of June 2013, the North Korean government offered to enter into talks that would represent the first dialogue of its kind in many years.
The South Korean government immediately accepted the proposal. 
  2 January: South Korea asks China to use its influence with North Korea to try to reduce tension over the nuclear issue, and two days later Russia offers to press Pyongyang to abandon its nuclear programme.
6 January: The IAEA passes a resolution demanding that North Korea readmit UN inspectors and abandon its secret nuclear weapons programme "within weeks", or face possible action by the UN Security Council.
7 January: The US says it is "willing to talk to North Korea about how it meets its obligations to the international community".
But it "will not provide quid pro quos to North Korea to live up to its existing obligations".
9 January: North Korea sends diplomats to meet with New Mexico governor Bill Richardson about the nuclear crisis; North Korea also agrees to hold cabinet-level talks with South Korea on 21 January.
10 January: North Korea announces it will withdraw from the Nuclear Non-Proliferation Treaty.
20 January: US Secretary of State Colin Powell calls on the IAEA to refer the North Korean nuclear issue to the United Nations Security Council for resolution.
21 January: Diplomatic talks commence between cabinet-level officials from both North Korea and South Korea; the North is represented by Kim Ryong Song.
24 January: Cabinet-level talks between North and South Korea end without making progress.
South Korean President-elect Roh Moo-hyun proposes face-to-face meeting with Kim Jong-il.
28 January: In his annual State of the Union address, President Bush alleges North Korea is "an oppressive regime people live in fear and starvation".
He accuses North Korea of deception over its nuclear ambitions and says "America and the world will not be blackmailed".
29 January: North Korea says Mr Bush's speech is an "undisguised declaration of aggression to topple the DPRK system" and dubs him a "shameless charlatan".
At the same time, however, it reiterates its demand for bilateral talks on a non-aggression pact.
31 January: Unnamed American officials are quoted as saying that spy satellites have tracked movement at the Yongbyon plant throughout January, prompting fears that North Korea is trying to reprocess plutonium for nuclear bombs.
White House spokesman Ari Fleischer delivers a stern warning that North Korea must not take "yet another provocative action... intended to intimidate and blackmail the international community".
4 February: The United States says it is considering new military deployments in the Pacific Ocean to back up its forces in South Korea, as a deterrent against any North Korean aggression, in the event that the US unleashes aggression on Iraq.
5 February: North Korea says it has reactivated its nuclear facilities and their operations are now going ahead "on a normal footing".
6 February: North Korea warns the United States that any decision to build up its troops in the region could lead the North to make a pre-emptive attack on American forces.
12 February: The IAEA finds North Korea in breach of nuclear safeguards and refers the matter to the UN security council.
16 February: Kim Jong-il celebrates his 61st birthday, but state media warns North Korean citizens to be on "high alert".
17 February: The US and South Korea announce that they will hold joint military exercises in March.
24 February: North Korea fires a missile into the sea between South Korea and Japan.
25 February: Roh Moo-hyun sworn in as South Korean president.
2 March: Four North Korean fighter jets intercept a US reconnaissance plane in international air space and shadow it for 22 minutes.
10 March: North Korea fires a second missile into the sea between South Korea and Japan in as many weeks.
22 March: As a blistering bombing campaign pounds the Iraqi capital, and South Korean and US forces perform military exercises on its doorstep, a jumpy North denounces their "confrontational posture" and calls off talks with the South.
1 April: The US announces that "stealth" fighters sent to South Korea for a training exercise are to stay on once the exercises end.
7 April: Ministerial talks between North and South Korea are cancelled after Pyongyang fails to confirm they would take place.
9 April: The United Nations Security Council expresses concern about North Korea's nuclear programme, but fails to condemn Pyongyang for pulling out of the Nuclear Non-proliferation Treaty.
12 April: In a surprise move, North Korea signals it may be ready to end its insistence on direct talks with the US, announcing that "if the US is ready to make a bold switchover in its Korea policy for a settlement of the nuclear issue, Korea will not stick to any particular dialogue format".
18 April: North Korea announces that it has started reprocessing its spent fuel rods.
The statement is later amended to read that Pyongyang has been "successfully going forward to reprocess" the rods.
23 April: Talks begin in Beijing between the US and North Korea, hosted by China.
The talks are led by the US Assistant Secretary of State for East Asian affairs, James Kelly, and the deputy director general of North Korea's American Affairs Bureau, Li Gun.
24 April: American officials say Pyongyang has told them that it now has nuclear weapons, after the first direct talks for months between the US and North Korea in Beijing end a day early.
25 April: Talks end amid mutual recrimination, after the US says North Korea had made its first admission that it possessed nuclear weapons.
28 April: US Secretary of State Colin Powell says North Korea made an offer to US officials, during the talks in Beijing, to scrap its nuclear programme in exchange for major concessions from the United States.
He does not specify what those concessions are, but reports say that Pyongyang wants normalised relations with the US and economic assistance.
Mr Powell says Washington is studying the offer.
5 May: North Korea demands the US respond to what it terms the "bold proposal" it made during the Beijing talks.
12 May: North Korea says it is scrapping a 1992 agreement with the South to keep the peninsula free from nuclear weapons - Pyongyang's last remaining international agreement on non-proliferation.
15 May: South Korean President Roh Moo-hyun meets US President George W Bush in Washington for talks on how to handle North Korea's nuclear ambitions.
2 June: A visiting delegation of US congressmen led by Curt Weldon says North Korean officials admitted the country had nuclear weapons had "just about completed" reprocessing 8,000 spent fuel rods which would allow it to build more.
9 June: North Korea says publicly that it will build a nuclear deterrent, "unless the US gives up its hostile policy".
13 June: South Korea's Yonhap news agency says North Korean officials told the US on 30 June that it had completed reprocessing the fuel rods.
18 June: North Korea says it will "put further spurs to increasing its nuclear deterrent force for self-defence".
9 July: South Korea's spy agency says North Korea has started reprocessing a "small number" of the 8,000 spent nuclear fuel rods at Yongbyon.
1 August: North Korea agrees to six-way talks on its nuclear programme, South Korea confirms.
The US, Japan, China and Russia will also be involved.
27–29 August: Six-nation talks in Beijing on North Korea's nuclear programme.
The meeting fails to bridge the gap between Washington and Pyongyang.
Delegates agree to meet again.
2 October: North Korea announces publicly it has reprocessed the spent fuel rods.
16 October: North Korea says it will "physically display" its nuclear deterrent.
30 October: North Korea agrees to resume talks on the nuclear crisis, after saying it is prepared to consider the US offer of a security guarantee in return for ending its nuclear programme.
21 November: Kedo, the international consortium formed to build 'tamper-proof' nuclear power plants in North Korea, decides to suspend the project.
9 December: North Korea offers to "freeze" its nuclear programme in return for a list of concessions from the US.
It says that unless Washington agrees, it will not take part in further talks.
The US rejects North Korea's offer.
President George W Bush says Pyongyang must dismantle the programme altogether.
27 December: North Korea says it will take part in a new round of six-party talks on its nuclear programme in early 2004.  
After Korea was divided by the UN, the two Korean powers both tried to control the whole peninsula under their respective governments.
This led to escalating border conflicts on the 38th parallel and attempts to negotiate elections for the whole of Korea.
These attempts ended when the military of North Korea invaded the South on 25 June 1950, leading to a full-scale war.
With endorsement from the United Nations, countries allied with the United States intervened on behalf of South Korea.
After rapid advances in a South Korean counterattack, North-allied Chinese forces intervened on behalf of North Korea, shifting the balance of the war.
Fighting ended on 27 July 1953, with an armistice that approximately restored the original boundaries between North and South Korea.
More than one million civilians and soldiers were killed in the war.
Although some have referred to the conflict as a civil war, other important factors were involved.
The Korean War was also the first armed confrontation of the Cold War and set the standard for many later conflicts.
It is often viewed as an example of the proxy war, where the two superpowers would fight in another country, forcing the people in that country to suffer most of the destruction and death involved in a war between such large nations.
The superpowers avoided descending into an all-out war against one another, as well as the mutual use of nuclear weapons.
It also expanded the Cold War, which to that point had mostly been concerned with Europe.
A heavily guarded demilitarized zone on the 38th parallel still divides the peninsula, and an anti-Communist and anti-North Korea sentiment remains in South Korea.
Since the Armistice in 1953, relations between the North Korean government and South Korea, the European Union, Canada, the United States, and Japan have remained tense, and hostile incidents occur often.
North and South Korea signed the June 15th North-South Joint Declaration in 2000, in which they promised to seek peaceful reunification.
On 4 October 2007, the leaders of North and South Korea pledged to hold summit talks to officially declare the war over and reaffirmed the principle of mutual non-aggression.
On 13 March 2013, North Korea confirmed it ended the 1953 Armistice and declared North Korea "is not restrained by the North-South declaration on non-aggression."
The nuclear program can be traced back to about 1962, when North Korea committed itself to what it called "all-fortressization", which was the beginning of the hyper-militarized North Korea of today.
In 1963 North Korea asked the Soviet Union for help in developing nuclear weapons, but was refused.
However, instead the Soviet Union agreed to help North Korea develop a peaceful nuclear energy program, including the training of nuclear scientists.
Later, China, after its nuclear tests, similarly rejected North Korean requests for help with developing nuclear weapons.
Soviet specialists took part in the construction of the Yongbyon Nuclear Scientific Research Center and began construction of an IRT-2000 research reactor in 1963, which became operational in 1965 and was upgraded to 8 MW in 1974.
In 1979 North Korea indigenously began to build in Yongbyon a second research reactor, an ore processing plant and a fuel rod fabrication plant.
North Korea's nuclear weapons program dates back to the 1980s.
Focusing on practical uses of nuclear energy and the completion of a nuclear weapon development system, North Korea began to operate facilities for uranium fabrication, conversion, and conducted high-explosive detonation tests.
In 1985 North Korea ratified the NPT, but did not conclude the required safeguards agreement with the IAEA until 1992.
In early 1993, while verifying North Korea's initial declaration, the IAEA concluded that there was strong evidence this declaration was incomplete.
When North Korea refused the requested special inspection, the IAEA reported its non-compliance to the UN Security Council.
In 1993, North Korea announced its withdrawal from the NPT, but suspended that withdrawal before it took effect.
Under the 1994 Agreed Framework, the U.S. government agreed to facilitate the supply of two light water reactors to North Korea in exchange for North Korean disarmament.
Such reactors are considered "more proliferation-resistant than North Korea's graphite-moderated reactors", but not "proliferation proof".
Implementation of the Agreed Framework floundered, and in 2002 the Agreed Framework fell apart, with each side blaming the other for its failure.
By 2002, Pakistan had admitted that North Korea had gained access to Pakistan's nuclear technology in the late 1990s.
Based on evidence from Pakistan, Libya, and multiple confessions from North Korea itself, the United States accused North Korea of non-compliance and halted oil shipments; North Korea later claimed its public confession of guilt had been deliberately misconstrued.
By the end of 2002, the Agreed Framework was officially dead.
In 2003, North Korea again announced its withdrawal from the Nuclear Proliferation Treaty.
On March 17, 2007, North Korea told delegates at international nuclear talks that it is preparing to shut down its main nuclear facility.
The agreement was reached following a series of six-party talks, involving North Korea, South Korea, China, Russia, Japan, and the United States begun in 2003.
According to the agreement, a list of its nuclear programs will be submitted and the nuclear facility will be disabled in exchange for fuel aid and normalization talks with the United States and Japan.
This was delayed from April due to a dispute with the United States over Banco Delta Asia, but on July 14, International Atomic Energy Agency inspectors confirmed the shutdown of North Korea's Yongbyon nuclear reactor and consequently North Korea began to receive aid.
This agreement fell apart in 2009, following a North Korean missile test.
In February 2012, North Korea announced that it would suspend uranium enrichment at the Yongbyon Nuclear Scientific Research Center and not conduct any further tests of nuclear weapons while productive negotiations involving the United States continue.
This agreement included a moratorium on long-range missiles tests.
Additionally, North Korea agreed to allow IAEA inspectors to monitor operations at Yongbyon.
The United States reaffirmed that it had no hostile intent toward the DPRK and was prepared to improve bilateral relationships, and agreed to ship humanitarian food aid to North Korea.
The United States called the move "important, if limited", but said it would proceed cautiously and that talks would resume only after North Korea made steps toward fulfilling its promise.
However, after North Korea conducted a long-range missile test in April 2012, the United States decided not to proceed with the food aid.