James will formally swear in Mamdani at midnight when his term officially begins, and Sanders will oversee the mayor-elect’s ceremonial swearing-in later that day.

Incoming New York City Mayor Zohran Mamdani will be sworn into office in January by state Attorney General Letitia James and Sen. Bernie Sanders, I-Vt., his fellow democratic socialist.

Sanders will oversee the mayor-elect’s ceremonial swearing-in at a New Year’s Day block party, while James will formally swear in Mamdani at midnight when his term officially begins.

In a news release announcing the events, the transition noted that Sanders’ “unapologetic progressive values inspired Zohran to run for office in the first place.”