One hundred days can bring significant change—or not.

Mayor Zohran Mamdani’s ambitious campaign promises—such as universal child care, efficient and cost-free public transit, and a rent freeze—seem increasingly unlikely to be realized as he marks his 100th day in office this Friday.

Insiders report that much of Mamdani’s bold affordability agenda, which propelled the young socialist to an unexpected victory, has stalled in Albany. Governor Kathy Hochul appears hesitant to support the tax increases on the wealthy that Mamdani proposed to fund these initiatives.

“The reality of his mayoralty on Day 100 is quite different from the vision he had on Day 1,” shared Evan Ross Smith, a campaign consultant and pollster with Slingshot Strategies, in an interview with The Post.

“The central question over these initial 100 days has been whether he is genuinely trying to pass legislation or merely making ideological and political statements,” Smith continued.

Universal child care

Mamdani’s promise of complimentary child care for all city children aged six weeks to five years struck a chord with families burdened by exorbitant daycare costs.

And Mamdani seemingly got off to prodigious start a week into his tenure when Hochul, with the new mayor by her side, in January unveiled a $4.5 billion child care plan that included a “2-Care” pilot program for all 2-year-olds in the Big Apple.

But the 2-Care pilot program would only roll out for 2,000 kids in five school districts during its first year — a far cry from Mamdani’s promise.

The slower-than-promised start still hasn’t wiped Mamdani’s trademark grin off his face, as he spent the run-up to his 100th day in office crowing about a grab bag of accomplishments — including baby steps toward universal child care.

“On child care, he has successfully launched the pilot… but everything can’t be solved in 100 days,” said Yvette Buckner, a lobbyist and political strategist with the Buckner Group.

Hochul promised the state will foot the program’s bill that will balloon to $425 million by 2027, when 12,000 2-K seats would become available across the city.

All 2-year-olds will be covered by the end of Mamdani’s first term, officials said. But plans for future funding, including any potential expansions to all kids under 5, remain at the mercy of Albany.

Free buses

Mamdani’s catchy campaign promise of “fast and free” buses has hit a speed bump.

The new mayor conceded amid his 100 days self-congratulations this week that he won’t be able to deliver his promise of free buses this year.

Instead, Mamdani and his Albany allies are eyeing a pared-down pilot program that would make a handful of bus lines free for a year.

“We’re encouraged by the conversations we’re having with the governor and legislative leaders to take action on that in 2026 as a first step,” he told Politico.

The envisioned three free bus lines per borough, $45 million program is a far cry from the sweeping vision Mamdani outlined on the campaign trail.

Rent freeze

Mamdani’s campaign mantra of “freeze the rent” proved popular and resonant in a tenant-majority city with nation-leading leases.

But even as he has already broke his breathless promise to “immediately” freeze the rent for all two million tenants in rent-stabilized apartments, it seems the pledge is the most likely to become reality — because he doesn’t have to rely on Albany.

Mamdani appointed or reappointed six city Rent Guidelines Board members by February, a majority on the nine-seat panel tasked with deciding rents on stabilized homes.

Board members launched into their first meeting this year by signaling they expected to approve the rent freeze in May after a slew of hearings.

“From sweeping tax proposals to a rent freeze, he risks alienating the very businesses and taxpayers that fund the city’s budget,” said Steven Fulop, who leads the Partnership for NYC.

“Last year, he told business leaders he wanted to listen and be a partner to grow the economy. The question now is whether he follows through.”

‘A glimpse’

Insiders said the idealistic progressive — who promised on his inauguration day to deliver the most ambitious cost-of-living agenda since Mayor Fiorello La Guardia — is being mugged by the harsh realities of actual governance.

“I don’t think it’s been a disaster, but I do think there is a big difference between campaigning and governing,” said Chris Coffey, CEO and partner of Tusk Strategies, a political consulting firm.

“As any mayor will attest, it’s hard to rely on Albany for his biggest accomplishments. I think it’s notable that he’s partnered up with Hochul on child care, and we’ll see how that goes.”

Some argued that Mamdani can pick himself up after early struggles, but others ripped the mayor for getting elected on empty promises.

“It’s pretty clear the revolution is over. For those who thought was going to be a revolution, there is not,” said former city Comptroller Scott Stringer, one of Mamdani’s election rivals.

J.C. Polanco, a Republican political expert and professor at University of Mount Saint Vincent, said: “These are false promises that got him elected.”

Mamdani and his media-savvy team have recently struck a slightly less grand tone on his promises than than he did as a candidate.

“We are coming to the end of 100 days in office,” he said Wednesday, “and we have sought to make this period one where we provide New Yorkers with a glimpse as to what these next four years will look like.”