On January 1, 2015, the Washington Capitals defeated the Chicago Blackhawks 3-2 in the first NHL Winter Classic. It was the first time the game had been played outdoors and it was a great success.
Saudi Arabia's King Abdullah dies at age 90 and is succeeded on the throne by his half-brother Crown Prince Salman. The country's leadership is in transition, with major changes to its diplomatic and economic policies.
The Houthis and government of Yemen sign a ceasefire agreement, but the latter reneges on some of the terms. The president and the prime minister resign, citing the Houthis' failure to follow through on their promises.
Boko Haram launches a deadly assault on Baga, the only major town in Nigeria's northeast that has resisted being taken over by the militant group. At least dozens are killed and the city is nearly completely destroyed.
Tax rates rise for many Americans, as part of the American Taxpayer Relief Act that was passed in order to avoid the so-called "fiscal cliff." It made permanent many but not all of the tax cuts that had been passed under President Bush.
The last day of school before Winter Break begins.