New York, New York - Democratic socialist Zohran Mamdani will take office as New York's first Muslim mayor on Thursday, kicking off a four-year term filled with high expectations.

Just after the stroke of midnight on New Year's Eve, New York Attorney General Letitia James – friend to Mamdani, foe to President Donald Trump – will swear in the new mayor.

At midday, Vermont Senator Bernie Sanders will preside over an inauguration ceremony outside City Hall.

At a block party planned to take place along Broadway, festivities will echo "one of his core messages... that this is a great city, and we like living here," said Lincoln Mitchell, a Columbia University political science professor.

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The mayor-elect, an avowed socialist, campaigned on addressing the prohibitive cost of living in the metropolis of 8.5 million.

One of his key proposals is freezing rent on more than a million apartments, but it's unclear if the city board that handles rent control – packed with appointees of outgoing Mayor Eric Adams – will be supportive.

Details of Mamdani's other campaign promises – the construction of 200,000 units of affordable housing, universal access to childcare, publicly owned supermarkets and free buses – have yet to be spelled out.

But Mamdani has one ace in his pocket: an excellent relationship with New York Governor Kathy Hochul, who approves measures like the tax hikes he seeks.

Once an election is over, "symbolism only goes so far with voters. Results begin to matter a whole lot more," New York University lecturer John Kane said.

Despite expectations to the contrary, the late November Oval Office meeting between Trump and Mamdani went surprisingly well.

Mamdani "wisely sought a point of common ground with Trump: wanting to make New York City a better place to live," Kane said.

The Republican can "be surprisingly gregarious toward those that he perceives to have little leverage over," he added.

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Federal immigration officers are increasingly active in New York, which could become a flashpoint.

At 34, Mamdani is one of New York's youngest mayors and his political resume is short – he's held office once previously, as a local representative in the State Assembly.

To compensate, his team will include seasoned aides recruited from past mayors' offices and former president Joe Biden's administration.

Mamdani has also already opened dialogue with business leaders, some of whom predicted a massive exodus of wealthy New Yorkers if he won – a prediction proven wrong so far.

Mamdani has already captured some of his generation's cultural trappings with his brief forays into rap music, improv classes in Manhattan, and wearing what the New York Times called "the quintessential entry-level suit for a 30-something striving to be taken seriously."

New Yorkers have also noted his enthusiastic support of his wife, Syrian-born artist Rama Duwaji, with approval.

Her Instagram account has gained more than a million followers since November, according to Social Blade statistics.

And on the cover of The Cut, New York magazine's revered fashion and culture publication, she recently marked her own path – the hallmark of every young generation of city dwellers striving to make it there.

"At the end of the day, I’m not a politician. I'm here to be a support system for Z and to use the role in the best way that I can as an artist," she said.