Shortly after the ball drops in Times Square, the curtain will rise on Zohran Mamdani’s mayoral administration, when Mamdani is sworn in as the city’s 112th mayor.

Mamdani, 34, is planning two inauguration ceremonies on Thursday: a private swearing-in at the old City Hall subway station just after midnight, followed by a massive public celebration beginning at 1 p.m. at City Hall.

Here’s what to know about the two events:

Private midnight ceremony 

Mamdani will be joined by his wife, Rama Duwaji and several members of his immediate family, as well as a select group of reporters, for a small inauguration ceremony shortly after midnight on Thursday.

The swearing-in will take place in the original City Hall subway station, which opened in 1904 but was removed from the system in 1945 due to safety concerns.

Old City Hall Station

The old City Hall subway station was the original southern terminal station of the first line of the New York City Subway. (Go Nakamura for New York Daily News)

Go Nakamura for New York Daily News

The old City Hall subway station was the original southern terminal station of the first line of the New York City Subway. (Go Nakamura for New York Daily News)

“When Old City Hall Station first opened in 1904 — one of New York’s 28 original subway stations — it was a physical monument to a city that dared to be both beautiful and build great things that would transform working peoples’ lives,” the incoming mayor said in a statement.

Attorney General Letitia James, who has become a close ally of Mamdani, will administer the oath of office.

New York Attorney General Letitia James and Zohran Mamdani are pictured at the New York City Pride Parade on Fifth Ave. in Manhattan on Sunday, June 29, 2025. (Theodore Parisienne / New York Daily News)

Theodore Parisienne / New York Daily News

New York Attorney General Letitia James and Zohran Mamdani are pictured at the New York City Pride Parade on Fifth Ave. in Manhattan on Sunday, June 29, 2025. (Theodore Parisienne / New York Daily News)

Public ceremony

The much larger public inauguration ceremony will occur on the steps of City Hall and is scheduled to begin at 1 p.m. In the past, incoming mayors have hosted about 4,000 people around City Hall for the ceremony.

But Mamdani is thinking much bigger, hosting a massive “block party” and predicting up to 40,000 people could attend despite chilly temperatures. The Canyon of Heroes on Broadway, from Liberty Street up to City Hall, will be closed to traffic.

The party is set to include “music, performances and interfaith events,” according to Mamdani’s transition team. Public Advocate Jumaane Williams and incoming comptroller Mark Levine will also be sworn in.

Mayor-elect Zohran Mamdani and Sen. Bernie Sanders speak to the media as they join striking Starbucks workers on a picket line outside a Starbucks store on 4th Ave. near 11th St. in Brooklyn, New York on Monday, Dec. 1, 2025. (Gardiner Anderson / New York Daily News)
Mayor-elect Zohran Mamdani and Sen. Bernie Sanders speak to the media as they join striking Starbucks workers on a picket line outside a Starbucks store on 4th Ave. near 11th St. in Brooklyn, New York on Monday, Dec. 1, 2025. (Gardiner Anderson / New York Daily News)

Rep. Alexandria Ocasio-Cortez (D-Bronx) will introduce Mamdani, and Sen. Bernie Sanders (I-Vt.) will administer the oath of office. Mamdani has called Sanders one of his political heroes. Sanders, Ocasio-Cortez and Mamdani are now the three most recognizable leaders of the progressive wing of the Democratic Party.

Also in attendance will be former mayor Bill de Blasio and outgoing mayor Eric Adams, who confirmed his attendance on Tuesday. Mamdani said he invited all his predecessors to the ceremony.

Former Mayor Bill de Blasio speaks with Zohran Mamdani supporters at the mayor-elect's celebration party Tuesday, Nov. 4, 2025. (Barry Williams/ New York Daily News)
Former Mayor Bill de Blasio speaks with Zohran Mamdani supporters at the mayor-elect’s celebration party Tuesday, Nov. 4, 2025. (Barry Williams/ New York Daily News)

For his own inauguration, Adams passed on the traditional City Hall event, instead holding his ceremony in Times Square shortly after the famous ball drop to mark the start of the new year.

“I would like to be there to show the smooth, peaceful transition of power,” Adams said Tuesday. “We both know how important that is.”