Australia's longest day is the summer solstice (around Dec 21-23), with daylight hours varying by location; southern cities like Hobart get the most, around 15.5 hours, while northern cities like Darwin get fewer, around 12.9 hours, due to Earth's tilt, meaning more sunlight in the south during summer.
Australia's longest day of the year is the Summer Solstice, which occurs annually around December 21st or 22nd, marking the most daylight hours when the Southern Hemisphere is tilted furthest towards the sun. This date signifies the start of summer and brings the year's longest period between sunrise and sunset, varying slightly by location within Australia.
June 21st is the longest day (Summer Solstice) in the Northern Hemisphere because Earth's axis is tilted about 23.5 degrees, pointing that hemisphere most directly towards the Sun, maximizing daylight hours and marking the start of astronomical summer. This extreme tilt means the sun is highest in the sky and shines at its most direct angle, giving the North Pole continuous daylight (polar day) in areas within the Arctic Circle, while the Southern Hemisphere experiences its shortest day (Winter Solstice).
Because of the tilt of the Earth's axis, the Northern Hemisphere is leaning towards the sun, meaning we're getting the maximum amount of daylight. This brings 24 hours of daylight closer to the North Pole, but in the Lower 48 we experience between 14-16 hours of daylight.
That day therefore has the least daylight and the longest night. In the Northern Hemisphere, the winter solstice takes place on December 21 or 22; in the Southern Hemisphere it is June 20 or 21.
The precise astronomical moment occurs at 1:33am ACDT, Monday, December 22nd, marking the point when the Southern Hemisphere is tilted most directly towards the sun, meaning it's the greatest amount of daylight Adelaide will see all year.
Summer solstice (June 20 or 21): longest day of the year, marking the start of summer. Autumnal equinox (about September 23): day and night of equal length, marking the start of autumn. Winter solstice (December 21 or 22): shortest day of the year, marking the start of winter.
Svalbard. Halfway between mainland Norway and the North Pole, you'll find the Svalbard Islands where the polar bears reside. Here, you can really talk about an endless day – the sun patrols the sky in almost uniform circles all summer.
June 20th is most significantly known as World Refugee Day, a United Nations observance honoring refugees' strength and raising awareness about their plight, established in 2001 to mark the 50th anniversary of the Refugee Convention. It also marks historical events like the Jaws movie release (1975), Nicole Kidman's birth (1967), and World Productivity Day, promoting efficiency and good work habits.
The longest daylight of 2025 occurred on the Summer Solstice, which was June 20th in the Northern Hemisphere (around 10:42 PM EDT) and December 21st/22nd in the Southern Hemisphere, with the North Pole experiencing 24 hours of daylight and the South Pole experiencing 24 hours of darkness.
June 21, the summer solstice of the Northern Hemisphere, was chosen as International Yoga Day due to its meaning of light, energy, and equilibrium, a day when day and night intersect, which symbolizes the goal of yoga, which is to bring harmony between mind, body, and spirit.
The summer solstice occurs in June in the Northern Hemisphere and marks midsummer: the 'longest day' and 'shortest night' of the year. On this day, the number of hours of daylight are at their maximum, while the number of hours of night are at their minimum.
At the Northern Hemisphere's winter solstice the upper half of the Earth is at its furthest lean away from the sun — leading to the shortest day and longest night of the year. The winter solstice falls can fall between Dec. 20 and 23 — this year it's the 21st.
The longest day of the year is usually June 21st, marking the Summer Solstice in the Northern Hemisphere, but it can occasionally fall on June 20th or 22nd, with June 22nd being rare, and the exact date depends on your time zone and the precise moment of the solstice. For people in the Southern Hemisphere, this is the shortest day (Winter Solstice).
April to May
Temperatures are still pleasantly warm in the south, whilst in the north the days are markedly drier and remote outback roads begin to open up. Autumn colours explode across south New South Wales, Victoria and Adelaide, and it is arguably the best time to visit the Australian outback.
For most of Australia, July is the coldest month, averaging the lowest temperatures despite the winter solstice occurring in June; it takes time for the land and oceans to fully cool, pushing the coldest period into July and sometimes early August, especially in southern regions, while mountainous areas see their coldest snaps then for snow.
The summer solstice occurs during the hemisphere's summer. In the Northern Hemisphere, this is the June solstice (20 or 21 June) and in the Southern Hemisphere, this is the December solstice (21 or 22 December).
2025 is shaping up to be among the warmest years on record, behind 2024 but rivaling 2023. Globally, northern hemisphere summer temperature records are being broken in some big and shocking ways, from the Arctic to Oceania, and in many places in between.
June 20, 2025, is primarily known as World Refugee Day, a United Nations day to honor refugees' strength and raise awareness about displacement. It also marks the Summer Solstice, the longest day of the year in the Northern Hemisphere, and features various other observances like National Hike with a Geek Day, National Kouign Amann Day, National Ice Cream Soda Day, and National Take Your Dog to Work Day (often the Friday after Father's Day).
The Midnight Sun in Norway: A 24-Hour Daytime Wonder In Norway, particularly above the Arctic Circle in regions like Tromsø and Svalbard, nature offers an extraordinary spectacle known as the Midnight Sun. From late May to late July, the sun does not set, creating continuous daylight for about 76 days.
Perfect for sunseekers, India has an average of 300 sunny days a year. It's a great winter destination, with peak season lasting from November to March.
The sun still rises and lightens Iceland for a short period every day. At its peak, December and January only experience 4-5 hours of daylight each day during winter.
For about three days around the solstice—December 19, 20, and 21—the Sun rises and sets at nearly the same spot on the horizon each morning and evening. To ancient observers without precision instruments, it looked like the Sun had stopped moving.
September 21, 2025, a partial solar eclipse, is an upcoming celestial event that has captured the attention of astronomy enthusiasts worldwide. A solar eclipse occurs when the moon passes in front of the sun, blocking the light from the sun and casting a shadow on the earth's surface.
In New York City on September 22, 1776, Nathan Hale, a Connecticut schoolteacher and captain in the Continental Army, is executed by the British for spying. A graduate of Yale University, Hale joined a Connecticut regiment in 1775 and served in the successful siege of British-occupied Boston.