Utqiagvik, Alaska, has entered a period of continuous daylight where the sun will not set for approximately 84 days [1].
This phenomenon, known as the midnight sun, significantly alters the daily rhythms of the northernmost city in the U.S. and highlights the extreme geographic conditions of the Arctic Circle.
The period of constant sunlight began following the final sunrise on May 10, 2024 [3]. Residents of the city, formerly known as Barrow, will now experience a sky that remains bright throughout the entire 24-hour cycle. This cycle is expected to continue until Aug. 2, 2024 [2].
The occurrence is a result of the Earth's axial tilt. During the summer months, this tilt keeps the Arctic Circle pointed toward the sun, preventing it from dipping below the horizon for those living at high latitudes [5]. While the sun remains visible, it does not stay at a fixed height; instead, it circles the sky, reaching its lowest point at midnight.
Utqiagvik serves as a primary example of this astronomical event due to its position as the most northerly city in the U.S. [1]. The transition from the dark winters to the relentless light of summer is a defining characteristic of life in the region.
Local infrastructure and lifestyle often adapt to these conditions. Because the sun does not provide a natural signal for sleep, many residents rely on blackout curtains to simulate nighttime. The period of daylight provides a critical window for outdoor activity, and resource gathering, before the region returns to the darkness of winter.
“the sun will not set for approximately 84 days”
The midnight sun is a predictable astronomical event caused by the Earth's 23.5-degree tilt. For inhabitants of Utqiagvik, this period represents a vital seasonal shift that impacts biological circadian rhythms and local economic activity, as the constant light allows for extended hours of labor and travel in a region otherwise defined by extreme seasonal darkness.
