Posted by TikTok user @annieineventyrland, the video amassed more than 12 million views as she discussed the benefits of having babies sleep outside. Sometimes, she said, the baby is left in the stroller alone outside with a baby monitor while the parent runs errands or goes into a café.

Time spent outdoors may be one way to ensure a good night’s sleep for a baby, but the Mayo Clinic had a few other recommendations, including developing a schedule and following a consistent bedtime routine.

“Overstimulation in the evening can make it difficult for your baby to settle to sleep,” the organization said. “Try bathing, cuddling, singing, playing quiet music or reading, with a clearly defined endpoint when you leave the room. Begin these activities before your baby is overtired in a quiet, softly lit room.”

Parents are also advised to put a baby to bed drowsy, but awake. This practice will allow a baby to associate their bed with the process of falling asleep.

“Fresh air is said to keep babies healthy and help them sleep better, and napping your baby outside is done in all sorts of weather,” @annieineventyrland said in her video.

The baby’s body temperature is regulated thanks to light wool clothing and a down duvet.

TikToker @annieineventyrland said parents who go into a store will keep an eye on the carriage while completing their errand, but babies are not often kidnapped.

“No one wants the responsibility of someone else’s kid, especially when our healthcare system does everything they can to help everyone who wants their own for little to no cost,” she said.

TikToker @annieineventyrland added that she has her own baby sleep outside in her stroller while they are at home.

“It’s for her to get the benefits of fresh air,” she said. “It’s her most familiar sleeping surface at this point, and I love that if my family and I ever want to go somewhere while she’s napping, we’re never stuck at home.”

TikToker @annieineventyrland wrote to Newsweek that she heard about the practice before moving to Denmark, but she was still shocked to see the practice in action at first.

“Mostly, I was taken aback by what it said about Danish society—that this is such a safe practice that it is even recommended by the National Board of Health,” she said.

TikToker @annieineventyrland said she noticed that her child will sometimes take longer naps, but she’s primarily happy she’s getting so much fresh air.

“I hope that when people see my TikTok about babies sleeping in strollers outside, they consider why the Danish healthcare system and social services allow us to live in a society that’s so safe and functional,” she said.

Though a cultural norm in Denmark, many TikTok viewers flocked to the comments section and voiced their surprise.

“It sure sounds crazy—but if it works in your country I agree with the benefits of it,” a viewer wrote.

“Imagine feeling this safe in a country,” another viewer commented.

“Wow that’s amazing…In our country we’d go [to] jail if we did this,” one viewer wrote.

“Love this! But I’m in Perth, Aust[ralia] and even if it was safe from kidnappers, [I’d] be worried they’d get too hot,” a comment read.

Some voiced their appreciation for the practice.

“I feel like safely having the ability to walk away from your child when needed and do public/adult things would make better parents,” a viewer said.

One viewer said the practice is common where they live in Sweden.

“Some of our preschools even let the kids sleep outside,” they wrote.

TikToker @annieineventyrland said there are other common parenting practices people may not be used to in addition to letting children sleep outside.

“Everything from feeding young children what’s practically our national dish: dark, dense, seeded rye bread with liver pate to a national effort to parent and treat kids gently and with respect,” she said. “I talk a lot about Danish approaches to child-rearing on my TikTok series called ‘Things That Are Normal Here In Denmark That I’m Scared To Tell My American Friends.’”

Other social media posts relating to parenting have previously gone viral.

A woman posted a video in which she called for parents to stop bringing crying babies on flights, sparking a debate among viewers.

One woman’s video went viral after she revealed how a mother was able to tell her triplets apart. Another mother was supported for going out for an hour without her baby.

Updated 10/03/2022, 4:40 p.m. ET: This story has been updated with comments from @annieineventyrland.

Updated 10/04/2022, 10:00 a.m. ET: This story has been updated with a verified video of the incident.