February 3 – visits a mosque in Baltimore, marking his first visit to a mosque in the United States.[12]
February 4 − holds a bilateral meeting and a press conference with President Juan Manuel Santos of Colombia, where Obama announced a $450 million plan to fund Plan Colombia.[13]
March 20 – The President and the First Family travel to Havana, Cuba, to underscore the thaw in Cuba–United States relations following a 54-year rift; Obama is the first sitting U.S. president to visit the country since Calvin Coolidge in 1928.[24]
March 31 – On the sidelines of the Nuclear Security Summit, Obama holds a trilateral meeting with Prime Minister Shinzō Abe of Japan and President Park Geun-hye of South Korea to discuss trilateral cooperation amid North Korea's nuclear program.[31]
March 31 – holds a bilateral meeting with President Xi Jinping of China to discuss "global nuclear security cooperation" amid North Korea's nuclear program, as well as "constructive" cooperation regarding the territorial disputes in the South China Sea.[32]
April 21 – participates in a summit meeting with the leaders of the Gulf Cooperation Council in Riyadh to discuss ways of addressing the Islamic State of Iraq and the Levant and other regional conflicts, including the Syrian and Yemeni crises.[37]
April 25 – becomes the first sitting U.S. president to visit the Hannover Messe, the world's largest industrial fair, which he opened as the U.S. was the "partner country" of the fair.[47]
May 22 – arrives in Hanoi for a three-day visit to Vietnam aimed at building stronger economic and defense ties with the country and the Asia-Pacific region.[54][55]
May 23 – announces the full lifting of the 32-year arms embargo on Vietnam.[56]
July 8 – In Warsaw, Obama comments on the shooting of Dallas police officers in the aftermath of the fatal shootings of Sterling and Castile, the deadliest single incident in the history of U.S. law enforcement since the September 11, 2001 attacks He calls the event "a vicious, calculated and despicable attack on law enforcement,"[75] and orders all U.S. flags to be flown in half-staff for five days in honor of the five victims.[76]
July 22 – holds a bilateral meeting and a press conference with President Enrique Peña Nieto of Mexico.
August 2 – welcomes Singaporean Prime Minister Lee Hsien Loong to the White House for a state visit; the Obamas host a state dinner at the White House for Singaporean Prime Minister Lee Hsien Loong.
August 6 – begins his vacation of the island of Martha's Vineyard for the 6th and final time during his presidency.[78]
August 21 – and his family return to the White House after a 16-day vacation on the island of Martha's Vineyard off the coast of Massachusetts.[79]
August 23 – visits Baton Rouge to survey the damage and to comfort the victims of flood destruction in 20 Louisiana parishes.[80]
August 31 – leaves on his final trip to Asia as President. He visits Midway Atoll, China and Laos.[81]
November 9 – calls President-elect Donald Trump in the early morning hours to congratulate him on his victory.
November 10 – meets with President-elect Donald Trump at the Oval Office to discuss the transition of power between the presidents. President Obama states the meeting was "excellent," and President-elect Trump says the meeting was supposed to last around 10–15 minutes, but went on to be around 90 minutes.
November 14 – holds his first news conference since the election of Donald Trump and encourages Americans to give him some time to get adjusted to the responsibilities of the position as President.[87]
November 26 – releases a statement on the death of Fidel Castro saying in part, "History will record and judge the enormous impact of this singular figure on the people and world around him. "[91]
December 2 – holds a bilateral meeting with Secretary-General-designate António Guterres of the United Nations.
December 6 – gives his last national security speech at MacDill Air Force Base in Florida. In the speech, the President says that the danger of terrorism is a long-term issue, saying "the threat will endure".[92]
December 16 – holds his final press conference of 2016.[96]
December 16 – and his family travel to Hawaii on Air Force One for their annual holiday vacation.[97]
December 23 – signs into law the annual defense spending bill which would increase military pay and require all new recruits to be issued athletic shoes made in the United States.[98]
December 27 – visits the USS Arizona Memorial with Japanese Prime Minister Shinzō Abe to honor the 2,403 Americans who died on December 7, 1941.[99]
January 12 – signs an executive order which ends the exemption for Cubans who arrive in the United States without visas.[107] Obama presents Vice President Joe Biden with the Presidential Medal of Freedom.[108]
January 19 – commutes the sentences of 330 nonviolent drug offenders, the most acts of clemency ever granted in a single day by any U.S. president.[114]
January 20 – completes his two terms in office and leaves the White House for the final time as President.[115]
January 20 – Donald Trump is inaugurated as the 45th president of the United States, at noon EST. Obama, who is now former president, leaves for a vacation in Palm Springs, California to begin his post-presidency.[116]
Sennott, Charles M. (May 5, 2015). "The First Battle of the 21st Century". The Atlantic. Archived from the original on July 30, 2019. Retrieved May 15, 2015. Even after 14 years of war in Afghanistan, the U.S. military has not fully succeeded in restoring security to the country or defeating the Taliban. Now, at the request of the new Afghan government, the United States has delayed the completion of its troop withdrawal from the country until 2016 at the earliest.