when does zohran mamdani take office

Zohran Mamdani is set to take office as New York City mayor at 12:01 AM on January 1, 2026, with a traditional midnight transition date. A public inauguration at City Hall is typically held later that same day, though the official oath occurs at the start of the new year per the city charter. This makes him the youngest NYC mayor in over a century and the first Muslim, first South Asian, and first NYC-born mayor to hold the office.