With Hồ Chí Min's permission, the Việt Cộng planned a massive Tet Offensive that would commence on 31 January 1968, with the aim of taking much of the South by force and administering a heavy blow to the American military. The offensive was executed at great cost and with heavy casualties on Việt Cộng's political branches and armed forces.
Bakhtiar invited Khomeini back to Iran, with the intention of creating a Vatican-like state in the holy city of Qom, declaring that "We will soon have the honor of welcoming home the Ayatollah Khomeini". On 1 February 1979 Khomeini returned to Tehran in a chartered Air France Boeing 747. The welcoming crowd of several million Iranians was so large he was forced to take a helicopter after the car taking him from the airport was overwhelmed by an enthusiastic welcoming crowd.
From January 7 until January 31, the Emperor's formal appellation was "Departed Emperor." His definitive posthumous name, Shōwa Tennō, was determined on January 13 and formally released on January 31 by Toshiki Kaifu, the prime minister.
On January 31, during an episode of Sunday Night Heat, Mankind pinned The Rock using a forklift truck in an Empty Arena match to win the WWF title. This match was referred to as "Halftime Heat" as it was televised during halftime of that year's Super Bowl.
Ibrahimović was eligible to represent Sweden, Bosnia and Herzegovina or Croatia at international level; he chose Sweden. He made his debut for Sweden in a 0–0 friendly draw against the Faroe Islands at Tipshallen on 31 January 2001 during the 2000–01 Nordic Football Championship.
The first super-spreader, Zhou Zuofen would bring the disease to the international stage. He checked in to the Sun Yat-sen Memorial Hospital in Guangzhou on January 31. This was the same hospital where Liu Jianlun was treating the disease. The virus was soon spread to nearby hospitals while Liu would later spread the disease to Hong Kong.
Biden declared his candidacy for president on January 31, 2007, after having discussed running for months prior. Biden made a formal announcement to Tim Russert on Meet the Press, stating he would "be the best Biden I can be". In January 2006, Delaware newspaper columnist Harry F. Themal wrote that Biden "occupies the sensible center of the Democratic Party". Themal concludes that this is the position Biden desires and that in a campaign "he plans to stress the dangers to the security of the average American, not just from the terrorist threat, but from the lack of health assistance, crime, and energy dependence on unstable parts of the world".
BMW Group, on 31 January 2013, announced that Pierer Industrie AG has bought Husqvarna for an undisclosed amount, which will not be revealed by either party in the future. The company is headed by Stephan Pierer (CEO of KTM). Pierer Industrie AG is 51% owner of KTM and 100% owner of Husqvarna.
On January 31, Trump nominated U.S. Appeals Court judge Neil Gorsuch to fill the seat on the Supreme Court previously held by Justice Antonin Scalia until his death on February 13, 2016.
On 31 January 2020, Italy closed all passenger air traffic between Italy and China and Taiwan. The Italian Civil Aviation Authority NOTAM says that effective 31 January, all passenger flights from China, including the special administrative regions of Hong Kong and Macau, and Taiwan are suspended until further notice, on request of the Italian health authorities. Aircraft that were flying to Italy when the NOTAM was published, was cleared to land. On the same day, the WHO declared that the number of infected cases is 9826 and 213 confirmed death case
On 31 January 2020, an article in The Lancet estimated that 75,815 individuals (95% CrI 37,304–130,330) have been infected in Wuhan as of 25 January, with an estimated doubling time of 6.4 days in the period of study.