In December 1942, after a British blockade lasting one hundred and one days, Governor Pierre Nouailhetas surrendered French Somaliland.

In December 1899, Marie Curie and Pierre Curie discovered radium in pitchblende.

When it declared devoid of canonical effect the consecration ceremony conducted by Archbishop Pierre Martin Ngô Đình Thục for the Carmelite Order of the Holy Face group at midnight of 31 December 1975, the Holy See refrained from pronouncing on its validity.

The December 1935 Hoare – Laval Pact was an attempt by British Foreign Secretary Samuel Hoare and French Prime Minister Pierre Laval to end the conflict in Abyssinia by proposing to partition the country into an Italian sector and an Abyssinian sector.

Despite the only French naval victory ( during the Napoleonic Wars ) of Battle of Grand Port on 19 and 20 August 1810 by a fleet commanded by Pierre Bouvet, Mauritius was captured on 3 December 1810 by the British under Commodore Josias Rowley.

Pierre Roger, the fourth of the Avignon Popes, was pope from May 1342 until his death in December of 1352.

In December 1899, Marie Curie and Pierre Curie discovered radium in pitchblende.

In a specific pronouncement in 1976, the Congregation for the Doctrine of the Faith declared devoid of canonical effect the consecration ceremony conducted for the Palmarian Catholic Church by Archbishop Pierre Martin Ngô Đình Thục on December 31, 1975, though it refrained from pronouncing on its validity.

* December 25 – Pierre Victor Auger, French physicist ( b. 1899 )

* December 6 – Pierre Graber, Swiss Federal Councilor ( d. 2003 )

* December 8 – Pierre Etchebaster, French real tennis player ( d. 1980 )

* December 26 – Marie and Pierre Curie announce discovery of a substance they call radium.

* December 9 – Pierre Henry, French composer

* December 24 – Pierre Jurieu, French Protestant leader ( d. 1713 )

* December 17 – Pierre Louis Roederer, French politician, economist, and historian ( b. 1754 )

* December 14 – Pierre Puvis de Chavannes, French painter ( d. 1898 )

* December – Pierre de Ronsard, French poet ( b. 1524 )

* December 5 – Pierre Gaultier de Varennes et de La Vérendrye, French-Canadian explorer and trader ( b. 1685 )

* December 14 – Pierre Samuel du Pont de Nemours, French politician ( d. 1817 )

* December 23 – Pierre Varignon, French mathematician ( b. 1654 )

* December 14 – Pierre Dupuy, French scholar ( b. 1582 )

* December 1 – Pierre d ' Hozier, French historian ( b. 1592 )

* December 28 – Pierre Bayle, French philosopher ( b. 1647 )

* December 2 – Pierre Paul Puget, French artist ( b. 1622 )

In 1978, he attacked the pro-European policy of Valéry Giscard d ' Estaing ( VGE ), and made a nationalist turn with the December 1978 Call of Cochin, initiated by his counsellors Marie-France Garaud and Pierre Juillet, which had first been called by Pompidou.

* December 6 – Eve Curie, French author ( d. 2007 )

Antoine Henri Becquerel ( 15 December 1852 – 25 August 1908 ) was a French physicist, Nobel laureate, and the discoverer of radioactivity along with Marie Skłodowska-Curie and Pierre Curie, for which all three won the 1903 Nobel Prize in Physics.

* Maria Skłodowska-Curie-on December 26, 1898, Marie Curie announced the existence of a new substance, radium.

* August 12 – Canada, Mexico, and the United States announce that a deal has been reached on the North American Free Trade Agreement ; the deal will be formally signed on December 17, 1992.

* December 9 – The Prince and Princess of Wales publicly announce their separation.

In spite of Oldsmobile's critical successes since the mid-1990s, a reported shortfall in sales and overall profitability prompted General Motors to announce in December 2000 their plans to phase out the Oldsmobile brand.

In the late afternoon of December 14, 2003, the CPA held a press conference at the Iraqi Forum convention center within Baghdad's Green Zone to announce that former President of Iraq Saddam Hussein had been taken into custody the previous night from a foxhole in a town near Saddam's home town of Tikrit, Iraq.

In December 2011, the National government announce that it plans reduce its shareholding of Mighty River Power as well as three other state-owned energy companies from 100 percent to 51 percent and sell off the remaining 49 percent as part of its controversial " mixed-ownership model " plan.

* December 2009-Seagate announce their first solid-state drive, the Seagate Pulsar.

Later that year, on December 7, WNYC was the first radio station in the United States to announce the Japanese attack on Pearl Harbor.

As of December 2010 the company states that refund policy has been approved " We are pleased to announce that we have finalized an agreement with government authorities that will permit owners of VAP-Qualified Accounts to be paid in U. S. dollars their proportionate share of the monetized value of the e-metals in such Accounts "

Griffith would announce on December 22, 2009 that he was switching parties to join the Republican caucus, becoming only the second Republican ever to represent the district.

On 4 December 2007, Subang SkyPark Sdn Bhd announce a RM 300 million plan to transform the Terminal 3 building into an ultra-modern general and corporate aviation hub.

On the December 14, 2009 episode of Raw, Vince McMahon came out to announce the nominees for Guest Host of the Year during the Slammy Awards.

On 28 December 1980, while the ITV network was showing Drake's Venture, Westward Television's two-hour filmed drama to celebrate the 400th anniversary of Sir Francis Drake's circumnavigation of the globe ( starring John Thaw ), ITN broke into a commercial break to announce that ATV was to undergo major changes and Southern and Westward had not had their licences renewed by the IBA ; the south-west franchise was awarded to TSW ( Television South West ).

* December 15 – McDonnell Douglas and Boeing announce their merger into The Boeing Company.

* December 2004: Tapwave announce Wi-Fi SD card for the Zodiac with “ enhanced mail application and web browser ”.

" In December, 1874, Gowen led the other coal operators to announce a twenty percent pay cut.

On December 12 episode of WWE Slammy Awards he appeared to announce the Slammy for A-Lister of The Year with Vickie Guerrero.

Nearly two years later – on December 22, 1993 the Cabinet of Ministers of the Republic of Latvia approved the commissions decision to announce the British and Finnish consortium TILTS Communications the winner of the tender „ On the modernisation of Latvia ’ s telecommunications network ”, and the company became a strategic investor in Lattelekom.

Hinojosa did not announce his bankruptcy filing in December, and did not acknowledge it publicly until asked about it by a reporter in February 2011.

* December 2005 ; Hitachi and Renesas announce 1. 5 V PRAM with 100 µA programming current

On the same day, HIH was to announce its first-half result for the six months to 31 December 2000.

Tickets went on sale 1 December 2010 and sold out within 12 hours, prompting the producers to announce a second concert to be performed at 3 p. m. on the same day.

On the 29th December 2010, unofficial reports in Italy and Brazil said President Lula was about to announce he had denied the extradition of Battisti, just 3 days short of ending his presidential mandate.

This and other events led the party to announce on December 12, 1935, a boycott of all elections held while Puerto Rico remained part of the United States.