New York City's incoming mayor, Zohran Mamdani, is set to be inaugurated on January 1 with a unique two-part ceremony. The day begins with a private midnight oath administered by Attorney General Letitia James, followed by a public ceremony on the steps of City Hall led by Senator Bernie Sanders. Breaking tradition, the inauguration will include a large public block party along the Canyon of Heroes, aiming for broad New Yorker participation. The event also faces scrutiny over antisemitism concerns.