99% of People on Earth Will Get Sunlight at the Same Time This Wednesday
On Wednesday, July 8, at about 11:10 GMT, 99% of the world's population will simultaneously experience daylight or twilight, due to Earth's tilt and the Northern Hemisphere summer.
Simultaneous Illumination Phenomenon
Today, July 8, at approximately 11:10 GMT, about 99 percent of the global population—some 8.2 billion people—will experience daylight or twilight simultaneously for a brief period lasting about a minute. The most populated areas of Earth will all be under the Sun, with only a small fraction experiencing nighttime.
Daylight will stretch across North America, South America, Europe, Africa, and most of Asia, where nearly all of the world's population lives. In darkness will be Australia, New Zealand, parts of Southeast Asia, Antarctica, and the surrounding oceans.
Daily Occurrence for About Two Months
This is not a one-day-only phenomenon. For about 60 days each year, from roughly May 18 to July 17, there is a brief moment each day during which nearly all of humanity experiences either daylight or twilight. The phenomenon became widely associated with July 8 following a viral social media post in 2022 that claimed it was the only day this occurred. A subsequent fact check by Time and Date found that while July 8 is one of the dates with the greatest overlap, similar conditions occur every day for about two months around the Northern Hemisphere summer.
Breakdown of Light Levels
At the moment when sunlight reaches almost everyone on Earth, about 6.9 billion people (83 percent) will be in full daylight. Another 581 million (7 percent) will experience civil twilight, when the sky remains bright enough for most outdoor activities without artificial lighting. A further 498 million people (6 percent) will be in nautical twilight, with the horizon still visible but the sky much darker. 249 million (3 percent) will be in astronomical twilight, with only a faint glow left before complete darkness. Just 83 million people (1 percent) will experience full night, when the Sun is more than 18 degrees below the horizon and the sky is completely dark.
Why July 8 Instead of the June Solstice?
The June solstice is the Northern Hemisphere's longest day and marks the beginning of summer. After the solstice, the Sun begins moving south, slightly reducing daylight in sparsely populated far northern regions but extending it into densely populated areas such as Indonesia and the Philippines. This small shift brings about 10 million more people into daylight or twilight than on the solstice itself.
