It’s one of New York’s biggest events — but the mayor can’t see how people stand it.

Mayor Bill de Blasio said he was still puzzled as to why anyone would want to spend 20 hours in Time Square, enduring frigid winter temps just to watch the yearly 20-second ball drop on New Year’s Eve.

“You know, it is – the ball drop itself is really cool and you feel a tremendous sense of, like, connection to all the people around you in those few seconds,” de Blasio said during his weekly WNYC appearance Friday.

“I think the hours and hours leading up to it for most people, I don’t get it still, but I admire the folks who have that fortitude,” the mayor joked. “But for the actual moment itself, it’s pretty magical.”

An estimated million visitors collect in Times Square every December for the century-old New Year’s eve tradition, though de Blasio’s distaste has endured.

“I’m not quite sure why a million people want to stand in the freezing cold for long, long periods of time, but they do,” the mayor said back in 2016.

Temperatures are expected to hover around the 30s on Tuesday. Revelers are expected to arrive in Times Square before 11 a.m. to stake out prime views of the ball drop from atop 1 Times Square.

The city will begin staging for the event in the early morning Tuesday. There will be 65 pens staged around the plaza, with street closures around Times Square beginning as early as 4 a.m.

Thousands of police officers will be deployed for New Year’s Eve festivities, including hundreds from the NYPD’s counterterrorism unit, according to department officials, who have promised multiple layers of protection.

Planning is a yearlong ordeal at the Police Department, beginning “when the last piece of confetti fell” last year, Police Commissioner Dermot Shea said during a news conference Friday.

Shea said the city has found no credible threats directed toward the event.

“This is going to be one of the most well-policed, well-protected celebrations in the entire world and we’ll have another safe and enjoyable New Year’s Eve,” Shea said.

The city advises participants to take mass transit to avoid heavy traffic delays and restrictive parking measures. Backpacks and large bags are prohibited.

Police will also have officers stationed in observation posts atop buildings and blocker cars or sand trucks will be positioned at every intersection to bar traffic. Drones will be deployed to “prevent unauthorized drones from coming into the area,” according to NYPD Chief of Department Terence Monahan.

“Drone mitigation is something we’ve been working hand in hand with our counterterrorism unit,” Monohan said.

As for bearing the weather and the crowds, Shea said it’s worth seeing in person at least once.

“For anyone that hasn’t been there, as crazy as it is to have to get there so early and freeze…it’s something you have to experience and you see the best of people,” Shea said.