‘Tis the season for mask mandates, booster shots, travel warnings — and a massive push for COVID-19 tests.

With the virus’s Omicron variant surging in the five boroughs, pols and experts are raising the alarm to try to keep New Yorkers vigilant during the holiday season.

“We don’t want to discourage people from gathering, but do what you know is smart, and keep those masks on when you’re with people if you don’t know if they’re vaccinated for sure,” Gov. Kathy Hochul said at a briefing Monday.

“It’s also a reminder that we have to take the steps now that everybody we love is with us for the next holiday season,” Hochul said. “We have the power over that.”

Mayor Bill de Blasio has made it clear that the city will not go into another pandemic lockdown under his watch — but nonetheless expanded mask mandates, including for private companies, and has yet to decide whether to call off the live New Year’s Eve celebration in Times Square.

He promised he would make the call before Christmas.

Meanwhile, officials are asking residents to be “prudent” when considering holiday travel plans if they expect to come in contact with anyone “vulnerable” to the virus.

According to the CDC, airline travelers are required to show proof of vaccination or a negative test within three days of boarding a domestic flight and one day before getting onto an international flight.

Masks are required on all flights, the CDC said.

For anyone getting behind the driver’s wheel, health officials urge travelers to be fully vaccinated before their trip or to get a negative test before taking off.

For residents staying home for the holidays, mask requirements and proof of vaccines are still required for New York City eateries, fitness facilities and entertainment venues.

On Monday, state officials said they are sending 6 million masks to New York counties for local distribution, including to schools, as well as shipping out 10 million do-it-yourself at-home COVID tests in the coming weeks.

“This is good progress, but we still need more,” state Homeland Security Commissioner Kathryn Garcia said at a briefing Monday. “And we need more partnership with the federal government. We need them to help make sure that there are tests available.”

The COVID tests have proven to be elusive amid the Omicron panic.

The city has more than 90 test centers listed online in the five boroughs, with de Blasio vowing to add another two dozen before the end of the year.

So far, the sites have been marked by long lines and frustrated New Yorkers.

“People are pissed,” resident Janet Cushey said outside a Sunset Park, Brooklyn, site. “The general sentiment among my peers is, ‘What the hell is going on?’ “

Others waiting in the cold for hours agree.

“We gotta do better,” said Bushwick resident Egypt Calier, who had already spent about 90 minutes online at a Brooklyn testing site.

“We gotta do better if you want us to get tested and make us do our part. There should be three or four tents out here. We shouldn’t have to wait three hours.”

A shivering resident who identified herself only as Ann S. said, “I feel tortured.”

Omicron is now the dominant variant of the virus in the US, with the new strain accounting for 73 percent of the new cases across the last week — and 92 percent in the New York area.

Health officials caution that Omicron spreads at a faster rate than the Delta variant but noted that the symptoms appear to be less severe than earlier strains.