Newly naturalized U.S. citizens wave flags and sing patriotic songs in a ceremony at Oakton High School in Vienna, Virginia, on Tuesday, December 22.
The Salisbury Cathedral Choir rehearses Monday, December 21, for Christmas Eve services in Salisbury, England.
An orangutan named Pacquiao dressed in a Santa costume joins holiday festivities at the Malabon Zoo in Malabon, Philippines, on December 21.
A boat sails along the Yenisei River outside Krasnoyarsk, Russia, on December 22.
A man walks his camel across the Liwa Oasis southwest of Abu Dhabi in the United Arab Emirates on December 20.
Carter Widmer, 7, arrives at Detroit Public Safety Headquarters on December 23 after becoming the Detroit police's "chief for a day." Chief James Craig gave the boy the honorary title after learning he donated $250 of his Christmas money to the Detroit police K-9 unit.
The Rev. Jesse Jackson jokes with the crowd before speaking at Morgan State University's December commencement on Friday, December 18, in Baltimore.
A girl stands outside a temporary shelter at a camp for dispaced Afghans in Kabul on December 21.
Cleaners in animal costumes wipe the 15th-floor windows of a Tokyo hotel during a December 21 event marking the end of the year.
A woman pours water onto a heat-stressed koala in Adelaide, Australia, on December 19.
Men keep themselves warm as they wait to collect milk from a dairy on December 18 in Allahabad, India.
Flames rise from the Portuguese Language Museum in Sao Paulo, Brazil, on December 21.
Muslim women react to a priest displaying a relic believed to be a hair from the Prophet Mohammed's beard during Eid-e-Milad-un-Nabi on Thursday, December 24, in Srinagar, India. Eid-e-Milad-un-Nabi celebrates Mohammed's birthday.
A nearly 6-week-old baby antelope called Kirk cuddles with attendant Andreas Uterhardt at Germany's Duisburg Zoo on December 18.
Cotton appears in the hair of a migrant worker as he makes a blanket from recycled cotton in Kathmandu, Nepal, on December 22.
White House press secretary Josh Earnest and "Star Wars" Stormtroopers wait for R2-D2 to enter the briefing room after U.S. President Barack Obama's end-of-the-year news conference December 18 in Washington. The characters were at the White House for a private screening of "Star Wars: The Force Awakens."
Young men play soccer on the outskirts of Myanmar's Bago Region on December 23.
A black kite swoops down on bats in Yangon, Myanmar, on December 22.
A firefighter surveys damage to a home after storms in Newport, Oregon, on December 18.
A thick blanket of fog envelopes a mountainous part of Pamplona, Spain, on December 23.
Virgil Hughes, center, and other musicians perform during the 41st annual TubaChristmas concert in Denver on December 20.
A man watches the sun set at Ipanema beach in Rio de Janeiro on December 18.