Making history, Mamdani took his oath with his hand placed on a Quran.
The New Year's Eve blast occurred in a bar called Le Constellation in the Swiss town of Crans Montana.
From the February vote in Bangladesh to the November US midterms, here is a calendar of key election dates.
The incoming mayor will use two family Qurans and a historic edition that symbolises New York City history.
Mamdani, the US city's first Muslim mayor, is also the youngest person to be inaugurated in generations.
Taiwan's Lai pledges to defend national sovereignty after Beijing holds live-fire drills around island.
People on the island have grown so accustomed to Chinese displays of power that life continues as usual.
These are the key developments from day 1,407 of Russia’s war on Ukraine.
Latest attacks bring total number of boat strikes to 33 and the number of people killed to at least 110 since September.
As the world enters 2026, cities celebrate with fireworks, concerts and gatherings across different time zones.