Zohran Mamdani, a 34-year-old democratic socialist, was sworn in publicly as the mayor of New York City on Jan. 1.

Incoming Mayor Zohran Mamdani will take his oath of office on a centuries-old Quran, marking the first time a mayor of New York City has used Islam’s holy text to be sworn in and underscoring a series...

He is the first Muslim and South Asian person to serve as mayor, the first to use a Quran at his swearing-in and the youngest mayor in over a century.