The US has delayed an intercontinental ballistic missile test scheduled for next week, defence officials say.
But the celebration has been relatively quiet and there has been no missile test.
North Korea has issued no specific warnings to ships and aircraft that a missile test is imminent.
Even so, Iran's defence minister, Admiral Ali Shamkhani, is relishing the consternation that the missile test has caused.
South Korea is currently on a high state of alert amid indications that the North is preparing for a missile test.
And a U.S. decision to postpone a long-range missile test this month could provide a pretext for the North to declare a symbolic victory.
The start of presidential campaigning in South Korea comes amid reports that North Korea could carry out a long-range missile test in coming weeks.
The secretary of state is in South Korea, and his visit coincides with the possibility of a North Korean missile test timed to grab headlines.
Technically, it would be important to them to have done a test and to - it's something like the metaphor of the missile test they did over the summer.
Japan is moving forward to rearm itself, the US and Japan are applying more pressure on the North, and the UN has condemned the North on its missile test.
Secretary of State John Kerry warned North Korea not to conduct a missile test, saying it will be an act of provocation that "will raise people's temperatures" and further isolate the country and its people.
While U.S. officials said there is "nothing to indicate" that North Korea can or will place a nuclear warhead atop a missile right now, most experts say it is very difficult to know the warhead and payload of a missile test in advance.
The BBC's Lucy Williamson in Seoul says there had been hopes that the US aid deal and a new, young leader were indications the crisis could be moving towards resolution, but that with the announcement of the missile test, those hopes have gone.
Friday's successful advanced missile defense test, which shot down a mock nuclear warhead in space, shows that the US is getting closer to defending the country against ballistic missile attack.
Turning back to China, Liberation Army Daily and the Beijing News report that China successfully carried out a land-based, mid-course missile interception test at an undisclosed location within its borders, but says the test did not target any country.
The submarines will carry the Bulava missile, despite recent test failures.
It is the only place on earth where, under the anti-ballistic missile treaty, the United States was allowed to test its strategic interceptor missiles, a key component of President Bush's missile-defence programme, sometimes known as Star Wars II.
Israel's defence ministry says it has carried out a successful test of its new missile interceptor system.
Biden is "Dr. No" with respect to pursuing development, test and deployment of missile defenses incompatible with the 1972 Anti-Ballistic Missile Treaty.
Apparently, the idea will be to exercise its radar with Israel's indigenous missile defense capabilities - adding additional test data to a similar U.S. experiment conducted last month while potentially considerably augmenting Israel's antimissile protection.
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Most recently, the importance of America's alliance with Japan has been underlined by North Korea's preparations to test a long-range missile.
Military and intelligence officials in Seoul and Washington have been watching for signs that North Korea might soon test another long-range missile.
The Navy plans to continue using the extremely reliable Lockheed Martin D-5 ballistic missile, which has seen 135 consecutive test launches without mishap.
The launch will undoubtedly be a test of an intermediate-range missile, not an attack.
Over the weekend, the US cancelled a scheduled test of its Minuteman 3 ballistic missile, citing concerns that it could be misinterpreted by Pyongyang.
Mr. Obama made the nurturing of U.S. alliances a major campaign theme, and, along with trade, the missile defense pact with Europe is the first test of whether he meant it.
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South Korean Defense Minister Kim Kwan-jin told a parliamentary committee in Seoul that the North has moved a medium-range missile to its East coast for an imminent test firing or military drill, according to the semi-official South Korean news agency Yonhap.
U.S. and South Korean officials have said that North Korea seems to be preparing to test-fire its long-range missile, the Taepodong-2.
South Korean officials have also said the North is poised to test-fire a medium-range missile capable of reaching the American territory of Guam.
Friedman said one review his office conducted last year turned up backlogs in flight and laboratory test schedules for five of nine nuclear missile warheads and bombs in the operational stockpile.
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