The sun will set for a final time this year in America's northernmost town, Utqiaġvik, Alaska.
Utqiaġvik is home to around 4,500 people, and the majority of residents are Iñupiat Alaskan Natives.
On Thursday, the polar night begins for the town formerly known as Barrow. Sunrise is at 12:46 p.m. Alaska Standard Time, with sunset less than an hour later at 1:37 p.m.
The next time the sun will rise will be on Jan. 22, 2022. Sunrise happens at 1:25 p.m., but it won't be up for long, as it sets again just 27 minutes later, according to timeanddate.com.
Daylight will increase further into late January, tallying four hours by the end of the month.
Utqiaġvik is about a four-hour flight, or 500 miles northwest, from Fairbanks, located just north of the Arctic Circle.
The town is also home to the Barrow Environmental Observatory, where researchers come to study the Arctic, according to the Ukpeaġvik Iñupiat Corporation.
The people of Utqiaġvik won't be in complete darkness for the next 64 days. Civil twilight happens for several hours during the period of polar night and will provide enough light to see during what would generally be daytime hours.
According to the National Weather Service, civil twilight begins when the sun's center is within 6 degrees below the horizon.
"Under these conditions, absent fog or other restrictions, the brightest stars and planets can be seen, the horizon and terrestrial objects can be discerned, and in many cases, artificial lighting is not needed," according to the NWS.
Utqiaġvik also experiences months without darkness during the summer, known as the "midnight sun." According to the Alaska Public Land Information Center, the midnight sun is only found above the Arctic Circle.
In 2022, the sun will never fully set between May 11 and Aug. 1.